Practice Exam 2 Flashcards
The ovaries produce:
estrogen
An earthquake that measures 4 on the Richter Scale would be how many times stronger than an earthquake that measured 2?
estrogen
An earthquake that measures 4 on the Richter Scale would be how many times stronger than an earthquake that measured 2?
100 times stronger
Muscles attach to bone with:
tendons
Atoms are most tightly packed in:
solids
Blood leaving the lungs is:
oxygenated
- The longest river in the world is:
Nile
- Mitosis is a process of:
(D) asexual reproduction
When added to a cloud’s name, which of the following means rain?
Nimbus
The movement of particles from an area of high concentration to an area of lower concentration is called:
diffusion
The instrument used to measure wind speed is:
anemometer
Electric charges can be:
(A) positive or negative
Which planet in the solar system has the most moons?
Saturn
Hydrogen has the atomic number 1. This means that hydrogen has:
one proton
Which U.S. space program is responsible for putting 12 men on the moon?
Apollo
Organisms that eat other organisms are called:
predators
Unlike most other fish, sharks have no:
bones
What human organ is responsible for cleaning the blood?
kidneys
- Kinetic energy is the energy that:
(C) is possessed by a moving object
In what year did the first woman travel in space?
1963
A step-up transformer:
increases the voltage in a power line
What animal has the heaviest brain?
sperm whale
Passing sunlight through a prism:
separates the colors into a spectrum
Molecules are created when:
atoms combine together
The first genetically engineered organism was:
tobacco
The vernal equinox is:
the first day of spring
If a hexahedral die is rolled two times, what’s the probability of NOT rolling a five both times?
The probability of rolling a 5 is 1 out of 6 (1⁄6), so the probability of NOT rolling a 5 is 1 – 1⁄6, or 5⁄6. The probability of not rolling a 5 twice is 5⁄6 5⁄6, or 25⁄36.
A 2-ton truck is taxed at a rate of $0.12 per pound. How much is the total tax bill?
2 tons = 4,000 pounds. 4,000 $0.12 = $480.00.
A half-pint of cream is what part of a gallon?
8 pints make up a gallon, so a gallon contains 16 half-pints. One half-pint equals 1⁄16 of a gallon.
The cost of a protein bar increased from $2.50 to $2.80. The percent increase to the $2.80 rate was how much?
First subtract the old cost from the new cost: $2.80 – $2.50 = $0.30. Then divide the difference by the old cost to find the percent difference: $0.30 ÷ $2.50 = 0.12 = 12%.
An aircraft flies over Boondock Air Force Base at 10:20 a.m. At 10:32 a.m., the plane passes over Sea Side Naval Air Station, 120 miles away. How fast is the aircraft traveling?
The aircraft travels 120 miles in 12 minutes, which is 1⁄5 of an hour. Therefore, in 5⁄5 (one) hour, it would travel 5 120, or 600 miles. The aircraft is traveling 600 miles per hour.
Last year, Margot grew 50 bushels of corn in her backyard. This year, the yield has increased 8%. How many bushels of corn did Margot grow this year?
Multiply 50 bushels by 8% to find the yield increase in bushels: 50 0.08 = 4. Add 4 bushels (the amount of the increase) to 50 bushels (the original yield) to determine that an 8% increase equals 54 bushels.
Junior has saved money in his piggybank over the winter. He wants to buy a $30 com- puter game. If he has 14 one-dollar bills, 16 half dollars, 12 quarters, 8 dimes, 25 nickels, and 10 pennies, how much more does he need to borrow from Dad to buy the game?
Subtract the total from $30.00 to determine how much money Junior has to borrow: $30.00 – $27.15 = $2.85.
Debbie receives a weekly salary of $80, plus a 5% commission on any sales. During the week, she has $800 in total sales. What’s the ratio of her commission to her salary?
Her commission for the week was $40 (0.05 800 = 40). The ratio of her commission to her salary is 40⁄80, which can be reduced to 1⁄2.
How many quart cans can be filled from a 25-gallon bucket of paint?
A gallon consists of 4 quarts. 4 25 = 100.
If a crew of four people can paint the barn in three days, how long will it take a crew of two people?
Dividing 4 crewmembers by 2 crewmembers shows that 4 members are twice as many as 2 members. Multiply the number of days it would take 4 people to paint by 2 (3 2) to determine how long it would take 2 people to do the same task.
Brian works for five hours and is paid $24. Christina works for three hours and is paid $10.95. How much more per hour does Brian make than Christina?
Brian’s hourly wage is 24⁄5 ($4.80). Christina’s hourly wage is 10.95/3($3.65). $4.80 – $3.65 = $1.15.
Margaret is getting married and must be ready by 11:15 a.m. If it’s now 8:30 a.m., how much time does she have to get ready?
The amount of time from 8:30 a.m. to 11:15 a.m. is 2 hours and 45 minutes, or 245⁄60. To reduce the fraction, divide 45 by 60 to get 0.75, or 3⁄4. The total amount of time Margaret has to get ready is 23⁄4 hours.
An accounting-firm employee is asked to shred 900 documents. If he can shred docu- ments at a rate of 7 per minute, the number of documents remaining after 11⁄2 hours of shredding is:
At a rate of 7 documents per minute, the employee can shred 630 documents in 90 min- utes. How do you come up with that number? Multiply 7 by 90 (the number of minutes in 11⁄2 hours). Subtract 630 from 900 total documents to determine that after 11⁄2 hours of shredding, 270 documents remain.
A home stereo depreciates by 20% each year. What’s the value of a stereo, pur- chased new for $1,200, after two years?
The stereo depreciates $240 the first year (0.2 1200 – 240). Therefore, the value of the stereo after the first year is $1200 – $240 = $960. The second year the stereo would depreci- ate by $192 (0.2 960). The value of the stereo after the second year is $960 – $192 = $768.
Janet’s old pickup truck can only reach a speed of 45 miles per hour. If she drives at top speed, how long will it take her to reach a city 135 miles away?
Divide the distance (135 miles) by the speed (45 miles per hour) to determine that Janet will take 3 hours to reach the city.
A blouse normally costs $18.50. How much money is saved if the blouse is purchased at a 20% discount?
Multiply the price of the blouse by the amount of the discount: $18.50 0.20 = $3.70.
A clerk’s weekly salary of $320 is increased to $360. The percent increase is:
Subtract the original salary from the new salary to get the difference in salary:
$360 – $320 = $40. Then divide the difference in salary ($40) by the original salary ($320) to determine the percent increase: 40 ÷ 320 = 0.125 = 12.5%.
Two go-carts are racing on a circular track with a perimeter of 360 feet. Camera One is following Go-Cart One, and Camera Two is following Go-Cart Two. If the angle between the two cameras is 40 degrees, how far apart are the two go-carts?
A circle is 360 degrees, so 40 degrees is 1⁄9 of a circle (360 ÷ 40 = 9). To get the answer of 40 feet, multiply the perimeter of the track 1⁄9 (360 1⁄9 = 40).
Dinner at a nice restaurant cost $35.98. If Joan gave the cashier $40.00, how much change should she get back?
Subtract $35.98 from $40.00 to get $4.02.
A balloonist circumnavigated the globe in 13 days, 12 hours, 16 minutes, and 13 sec- onds. A plane circumnavigates the globe in 4 days, 10 hours, 15 minutes, and 7 sec- onds. How much longer did it take for the balloon to go around the world?
Darlene bought 12 boxes of cookies for $48.00. What was the cost of each box of cookies?
Divide the total cost by the number of boxes purchased to determine the cost per box:
$48 ÷ 12 = $4.
A tune-up increases a car’s fuel efficiency by 5%. If a car averaged 20 miles per gallon before the tune-up, how many miles per gallon will it average after the tune-up?
Multiply 20 0.05 to determine how many more miles per gallon the car will get. The answer is 1. Then add the number of additional miles per gallon the car will get to the origi- nal number of miles per gallon the car gets to reach the new average: 1 + 20 = 21.
A lumberjack wishes to drive a spike through the center of a tree with a circumference of 43.96 feet. What’s the minimum length of the spike needed to go completely through the tree, passing through the center?
The minimum length of spike is equal to the diameter of the tree. To find the
diameter of the tree, use the formula, C = ÷ d, where C = 43.96, and ÷ = 3.14. 43.96 = 3.14 d. d = 43.96 ÷ 3.14. d = 14.
A bin of hard candy holds 101⁄2 pounds. How many 3⁄4 -pound boxes of candy can be filled from the bin?
A patio measures 12 feet by 14 feet. How many 8-inch-square paving stones are needed to pave the patio?
First multiply length width to determine the area of the patio: 12 feet 14 feet = 168 square feet. Next determine the area in square inches that needs to be covered: 168 square feet 12 inches = 2,016 square inches. Finally, divide that answer by the size of the stones to determine the number of stones needed: 2,016 ÷ 8 = 252.
A computer programmer is making $25,000 per year. 28% of her salary is withheld for federal and state deductions. How much is the computer programmer’s net pay?
Calculate the amount of the deduction by multiplying her salary by the percent deducted: $25,000 28% = $25,000 0.28 = $7,000. Subtract that product from the salary to determine the net pay: $25,000 – $7,000 = $18,000.
Pam cuts a pie in half in a straight line. She then cuts a line from the center to the edge, creating a 55-degree angle. What’s the sup- plement of that angle?
When the sum of two angles is 180 degrees, the angles are said to be supplemental to each other. To find the supplement, subtract 55 from 180 (180 – 55 = 125)
If two exponents have the same base, you can multiply them by keeping the base and adding the exponents together.
Convert 314,000 to scientific notation.
A reciprocal is the number by which a number can be multiplied to produce 1. So the reciprocal of 1⁄6 is 6 because 1⁄6 x 6 = 1.
(3x2)(7–2)(6+2)=(6x4)x. What’s the value of x?
Solve for x: 2x – 6 = x + 5
A tube has a radius of 3 inches and a height of 5 inches. What’s its approximate volume?
A right triangle has one right angle (one 90-degree angle).
Parallelograms have opposite sides of equal length.
Angles measuring more than 90 degrees are obtuse angles.
A square box has a volume of 64 cubic inches. What’s its perimeter?
Volume equals length times width times height (V = lwh). In this case, V = 64, so one side of the box is 4-inches long. The cube root of 64 produces this number: 64 = 4 x 4 x 4. Find the perimeter by adding the four sides together: 4 + 4 + 4 + 4 = 16.
4! =
4! (4 factorial) = 4 x 3 x 2 x 1 = 24.
What’s the sum of the integers from 1 to 300?
The symbol is a fuse. Fuses are designed to “blow” (melt) if the current flowing through it exceeds a specified value.
The symbol is a lamp. A lamp is a transducer that converts electrical energy to light.
The symbol stands for transformer. Transformers are used to step up (increase) and step down (decrease) AC voltages.
(D) cut bolts
(B) Allen wrench
(D). Moving Basket A to the right counterbalances the loss of cherries from Basket B.
If a ramp measures 6 feet in length and 3 feet in height, an object weighing 200 pounds requires how much effort to move using the ramp?
The formula to determine mechanical advantage of an incline plane is Length of Ramp ÷ Height of Ramp = Weight of Object ÷ Effort. Plugging in the numbers gives you:
(C). All the listed parts remain stationary except the lower block.
Apply the leverage formula: Length of Effort Arm divided by Length of Resistance Arm = Resistance Force divided by Effort Force. Or:
