math check
posted by tammy .
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....
Respond to this Question
Similar Questions

math check
Would some please check these and see if I am doing them right thank you 1. Gasoline is about $2 per gallon. You use about 1 1/2 gallons each day driving to and from work. How much should you budget for gasoline over the next month … 
math
Recognize that rectangles that have the same area can have different perimenters. Do rectangles with the same area necessarily have the same perimeter? 
Algebra
A circular aboveground pool has a diameter of 8ft and stands 5.5ft off the ground. If the pool company charges an installation fee of $11 per square ft, how much will the installation cost? 
MATH
A CIRCULAR COFFEE TABLE HAS A DIAMETER IF 5FT. WHAT WILL THE COST BE TO BE REFINISHED IF THE COMPANY CHARGES $3.00 PER SQUARE FOOT? 
Geometry
The figure is formed from tectangles. Find the total area 8Ft 5ft 3ft 3ft I just can't figure this out. or I am having a blond moment 
geometry
Determine the volume of the figure. The base of the pyramid is the triangle and we don't know it's height I need to find it first. solve for h The numbers are 5ft and 7ft on top and 6ft and 5ft on bottom. I have no idea how to do this … 
geometry
A room is 11ft by 21ft and it needs painted. The ceiling is 8ft above the floor. There are two windows in the room, each is 3ft by 4ft. The door is 2.5ft by 6.5ft. a)Find the area the walls and ceiling to be painted. b)One gallon of … 
Math
find the surface area and volume of a similar figure that is larger by scale factor of 25 using 3.14//// 5ft, 4ft, 3ft 
Algebra
A rectangular swimming pool that is 10 ft wide by 16 ft long is surrounded by a cement sidewalk of uniform width. If the area of the sidewalk is 155 ft2, what is its width? 
Geometry
given ABCD IS A rectangle . IF BC =5ft and AB =8ft find the missing sides