19. The circumference of a circular part of a
cylinder is 88cm. Its height is 20cm.
Calculate the volume of the cylinder
A. 12320cm
B. 30.8cm
C. 3080cm
D. 1760cm

A] 12320cm³

Step-by-step explanation:

Formula for finding the Volume of a cylinder is:

We have to find the r (radius) from the circumference given, since the value of r is not given.

Circumference = 2r

88 = 2 × × r

r =

r = 14.005...cm

∴  r is 14.01cm.

Now that we have found the value of r, we can proceed to find the volume of the cylinder.

Volume =

= × × 20

= × 196.3 × 20

= 12334cm

(Since I've used the whole value of Pi (), my answer didn't specifically match any of the options, but it is closer to the A option, thus 12320cm³ is your answer)

your answer is a

step-by-step explanation:

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answer: a video game has three difficulty levels: easy, medium, and expert. the game's scoring works in such a way that a player has to score a fixed number of points to advance to the next level, and then the scoring starts over. the total score needed to clear all three difficulty levels is 7,500. two times the number of points needed to clear the easy level is 500 more than the number of points needed to clear the medium level. twice the number of points needed to clear the medium difficulty level is 1,500 more than the number of points needed to clear the expert level. if x, y, and z represent the easy, medium, and expert levels, respectively, and a is the coefficient matrix of the system of equations modeling this situation, identify the inverse matrix, a-1, and the solution matrix, x, of the system of equations.

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step-by-step explanation: