quiz 16 8.1-8.5

Question 1

find the hours worked: 7:30 A.M. to 1:00 P.M.

Answer 1

12 - 7.5 + 1 = 5.5 or

5 hours 30 min.

Question 2

find the hours worked: 5:15 A.M. to 2:45 P.M.

Answer 2

12 - 5.25 + 2.75 = 9.5 or

9 hours 30 min.

Question 3

find the hours worked: 3:30 A.M. to 11:00 A.M.

Answer 3

11 - 3.5 = 7.5 or

7 hours 30 min.

Question 4

Find the unit price to the nearest tenth of one cent:

9 ounces for $1.50

Answer 4

$1.50 divided by 9 = $.167 or 16.7 cents

Question 5

Find the unit price to the nearest tenth of one cent:

15 ounces for $3.50

Answer 5

$3.50 divided by 15 = $.233 or 23.3 cents

Question 6

Find the unit price to the nearest tenth of one cent:

4 ounces for $1.25

Answer 6

$1.25 divided by 4 = $.313 or 31.3 cents

Question 7

Find the kilowatt-hours used:

400 watts for 5 hours

Answer 7

400 watts x 5 hrs = 2000. 2000 divided by 1000 = 2

2 kw-hr

Question 8

Find the kilowatt-hours used:

8 kilowatts for 30 minutes

Answer 8

8 kw x .5 hrs = 4.

4 kw-hr

Question 9

Find the kilowatt-hours used:

250 watts for 1 day

Answer 9

250 watts x 24 hrs = 6000. 6000 divided by 1000 = 6

6 kw-hr

Question 10

Mr. Peterson earns $15 per hour. Find his gross pay for working 40 hours.

Answer 10

$15 x 40 = $600

Question 11

Find the cost of 870 kilowatt-hours of electricity at the rate of 7.5 cents per kilowatt-hour.

Answer 11

870 x $.075 = $65.25