# math check

posted by
**tammy** on
.

1.find the area heigh 5ft width 8 ft

A=H x W

A= 5ft x 8Ft

A= 40ft^2

2.The circular surface of a table has a diameter of 4 ft. What it will cost to have the top refinished if the company charges $5.00 per square foot for the refinishing ? Use 3.14 for pi and round your answer to the nearest cent.

(3.14)x(4/2)^2

(3.14)(2)^2

(6.28)^2=39.4384

39.4384 x $5.00

$197.19

3. Divid by moving the decimal point 27.3/10^5=

.000273

4. A beef roast weighing 6.6lb costs $2.25 per pound. What is the cost of the roast?

$2.25

x 6.6

$14.85

5. Write 0.00548 as a common fraction or mixed number.

548/100,000 = 137/25,000

2.The circular surface of a table has a diameter of 4 ft. What it will cost to have the top refinished if the company charges $5.00 per square foot for the refinishing ? Use 3.14 for pi and round your answer to the nearest cent.

(3.14)x(4/2)^2

(3.14)(2)^2 **ok to here. For the next step you squared 3.14 x 2 but you should have squared just the 2.
3.14(2) ^{2} = 3.14(4)=12.566 ft^{2}. Then multiply by $5.00.**

(6.28)^2=39.4384

39.4384 x $5.00

$197.19

Two notes:

1. Numbers 1, 3, and 4 look ok.

2. The 12.566 I have above should be 12.56 if we are using 3.14 for pi. I used pi from the calculator which uses 3.14159....