NEED ANSWERS QUICK FOR ALL 3!! WILL AWARD BRAINLIEST! PLS HELP!!!
2 answers:
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We know diameter and height
.
First find the radius of the bottom of the cylinder,
.
Then find the area of the bottom of cylinder,
.
Then to find volume just multiply the height with the area of the bottom of the cylinder,
.
Hope this helps.
Answer:
4
Step-by-step explanation:
7x = x² - 8
=> x² - 7x - 8 = 0
use quadratic formula:
a = 1, b = -7, c = -8
x = <em>(pls ignore the "A" I don't know why it's showing up)</em>
=> x =
=> x =
=> x = = 4 or
= -5 <em>(the answer is only 4 since it's asking for the positive solution)</em>
In order to make them perpendicular, their dot product must result in zero. so:
