Please help and thank you

Mathematics

1 answer:

vladimir2022 [97]3 years ago

7 0

Answer: A & D

Explanation: When you multiply 15 and 4 and add that to 20 and 2 it would be 100. When you multiply 25 and 4 and add that to 25 and 2 it would be 150. Hope this helps :).

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What is the areaof a circle having a given diameter. d=16 cm

Elan Coil [88]

Area = $\pi r^2
$ so if the diameter is 16, radius (r) = 8

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If you're looking for the answer in terms of pi, 64pi is the answer.

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4 years ago

Find the volume of the solid generated by revolving the region bounded by the lines and curves about the x-axis. y = x, y =1, x

liraira [26]

Answer:

The volume is: $V = \frac{\pi}{3}$ cubic units

Step-by-step explanation:

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The volume of a solid, given by the function f(x), over an interval between a and b, is given by:

$V = \pi \int_{a}^{b} (f(x))^2 dx$

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This means that the upper function is y = 1, and the lower function is y = x. So

$f(x) = (1 - x)$

The lower limit of integration is x = 0.

The upper limit is y = x when y = 1, so x = 1.

Then

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$V = \pi \int_{0}^{1} (1-x)^2 dx$

$V = \pi \int_{0}^{1} (1-2x+x^2) dx$

$V = \pi (x-x^2+\frac{x^3}{3})|_{0}^{1} dx$

$V = \pi(1 - (1^2) + \frac{1^3}{3})$

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3 years ago

A semi-circle window can be used above a doorway or as an accent window

anzhelika [568]

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A circle is a shape that is bounded by a curved path which is referred to as the circumference. Some parts of a circle are radius, diameter, sector, arc, semi-circle, circumference, etc.

A semicircle is a part of a circle, and it is referred to as half of a given circle.

such that:

Area of a circle = $\pi$ $r^{2}$