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 (about 20 workdays)?
Answer 1 1/2 x $2.00 = $3.00 a day
20 day x $3.00= $60.00
2.Four buttons have diameters of 5/8 , 3/4 ,9/16 , and 7/8 inches. Which button is smallest?
Answer: B) 9/16
3. If the base of a parallelogram is 6 1/2 in. and its height is 1 1/2 in., what is its area?
6 1/2 x 1 1/2 = 13/2 x 3/2 = 39/4= 9 3/4
4. A triangle has base 15 feet (ft) and an altitude of 4 ft. Find its area.
1/2 x 4ft x 15ft= 30ft^2
5. 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 per square foot for the refinishing? Use 3.14 for piƒnand round your answer to the nearest cent.
A= 3.14 x 4ft/2^2
3.14 x 12^2
3.14 X 24
75.36ft
You'd better check you numbers on #5. The rest are OK
A= 3.14 x (4ft/2)^2
3.14 x 4 = ? ft^2
Then multiply that by $5/ft^2 for the cost
Sorry about the double posting i re did this problem am I correct now or Am I still missing some thing here.
5. 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 per square foot for the refinishing? Use 3.14 for piƒnand round your answer to the nearest cent.
A= 3.14 x 8^2
200.96ft
$5.00 x 200.96
$1,004.80
No. Area is pI radius^2. The radius here is 2ft (one half the diameter).
so i multply
pi which is 3.14 x half the diameter which is 2 this will give me the area
please recheck
A=3.14x2
A= 6.28^2
multiply
6.28^2 x $5.00
$197.19
Let's go through each question and check the answers:
1. Gasoline budget: You are correct. To find the amount to budget for gasoline over the next month, you multiply the amount used per day (1 1/2 gallons) by the price per gallon ($2.00), and then multiply that by the number of workdays in the month (20). So, the answer is $3.00 x 20 = $60.00.
2. Smallest button: You are correct. To determine the smallest button, you compare the diameters. Among the given options, the diameter 9/16 is the smallest one. So, the answer is 9/16.
3. Parallelogram area: You are correct. To find the area of a parallelogram, you multiply the base (6 1/2 in.) by the height (1 1/2 in.). Simplifying the multiplication leads to 39/4, which can also be written as 9 3/4.
4. Triangle area: You are correct. To find the area of a triangle, you multiply half the base (15 ft) by the altitude (4 ft). The result is 30 ft^2.
5. Table refinishing cost: The answer needs to be corrected. The formula to find the area of a circle is A = πr^2, where r is the radius. In this case, the diameter is 4 ft, so the radius is half of that, which is 2 ft. Therefore, the correct calculation is A = 3.14 x (2 ft)^2 = 3.14 x 4 ft^2 = 12.56 ft^2 (rounded to two decimal places). To find the cost of refinishing, you multiply the area (12.56 ft^2) by the cost per square foot ($5.00). So, the answer is $5.00 x 12.56 ft^2 = $62.80 (rounded to the nearest cent).
Therefore, in question 5, the correct answer should be $62.80.