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cestrela7 [59]
3 years ago
14

A circle with a 10 inch diameter is cut from a square piece of tin with 10 inch sides. To the nearest tenth of a square inch, fi

nd the amount of tin that is wasted.
Mathematics
1 answer:
saveliy_v [14]3 years ago
5 0

The area of the circle is

... A = (π/4)d² . . . . where d=10 in

The area of the square is

... A = d² . . . . . . . . where d=10 in

The amount of the square that is not in the circle is

... (1 -π/4)d² = 0.2146018d² ≈ 21.5 in² . . . for d=10 in

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The Perimeter or a regular pentagon is 41.5cm. Write and solve an equation to determine the length of each side of the pentagon
olchik [2.2K]

Answer:

8.3 cm

Step-by-step explanation:

So a pentagon has 5 equal sides, and the perimeter is the distance around a figure. Because we know the perimeter is 41.5 centimeters, we just divide that number by 5.

Perimeter (P) = s+s+s+s+s (sides)

P: 41.5 cm ÷ 5 =

8.3 cm

We know this is correct because:

8.3 + 8.3 + 8.3 + 8.3 + 8.3 = 41.5

Hope this helps!

4 0
3 years ago
A teacher must grade 32 reports. She can grade 4 reports in 90 minutes. How many hours will it take to grade 32 reports?
Nataly_w [17]

Answer:

The teacher will take 720 minutes or 12 hours to grade 32 reports.

Step-by-step explanation:

32 reports= x

4 reports= 90 minutes

Cross multiply method

90*32= 4x

2880= 4x

x= 720

The teacher will take 720 minutes or 12 hours to grade 32 reports.

Hope this helps!

4 0
3 years ago
Read 2 more answers
True or false <br> all prime numbers are odd <br> i said false is that correct
Mumz [18]
False

2 is the only even prime number, the rest of the prime numbers are odd.
8 0
4 years ago
If y varies inversely as x square, how does x vary with y?​
____ [38]

Answer:

this basically means that whenever x is increased then y will decrease, but if x is decreased y will increase.

Step-by-step explanation:

8 0
3 years ago
Jim spent $46.16 on some mulch and one shovel. Each bag of mulch costs $3.49 and the shovel cost $14.75. How many bags of mulch
mezya [45]
To find the amount he spent on bags of mulch you must take the cost of the shovel away from the total, giving the equation:
46.16-14.75=3.49x
To covert this to whole numbers, multiply by 100
4616-1475=349x
3141=349x
x=9
4 0
4 years ago
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