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Bezzdna [24]
3 years ago
12

I am greater than 30 and less than 40 the sum of my digits is less than 5

Mathematics
2 answers:
gregori [183]3 years ago
6 0
31. 
31 is > 30.
31 is < 40.
3 + 1 = 4.
PolarNik [594]3 years ago
5 0
Answer is 31

30<x<40

x=(y+z)<5

3+1=4
3+2=5 Nope and anything higher is Nope
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A volunteer is organizing the snacks at a concession stand and notices the ratio is sweet snacks to salty snacks is 5:1. If ther
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3 years ago
Can some explain how to do this?
zepelin [54]

Answer:

  • Exact Area = 210.25pi - 210
  • Approximate Area = 450.185

The units for the area are in square inches or in^2. The approximate value shown above is when using pi = 3.14

=============================================================

Explanation:

Use the pythagorean theorem to find the length of the hypotenuse

  • a = 20
  • b = 21
  • c = unknown

a^2 + b^2 = c^2

20^2 + 21^2 = c^2

400 + 441 = c^2

c^2 = 841

c = sqrt(841)

c = 29

The hypotenuse is 29 inches long. This is the diameter of the circle. Half of that is the radius at r = d/2 = 29/2 = 14.5 inches.

The area of the circle is...

A = pi*r^2

A = pi*(14.5)^2

A = pi*210.25

A = 210.25pi

Which is exact in terms of pi

We'll subtract off the triangular region as this isn't shaded in. The area of the triangle is base*height/2 = 20*21/2 = 420/2 = 210 square inches.

So the shaded region is therefore 210.25pi - 210 square inches

This approximates to 210.25*3.14 - 210 = 450.185 when using the approximation pi = 3.14; use more decimal digits of pi to get a more accurate value.

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3 years ago
What is the area of this composite figure?
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the area of a circle is r^2×pi (here 2^2×pi) then add the area of the middle rectangle (so 4×6)

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2 years ago
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