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Vlad [161]
4 years ago
13

The radius of the inner cylinder is three centimeter and the radius of the outer cylinder is eight centimeters. Find the volume

of the non-shaded region.

Mathematics
1 answer:
QveST [7]4 years ago
3 0
Compute the two volumes and subtract!

V Cylinder = pi * r^2*height

V1 = pi*8^2*15, V2 = pi*3^2*15,

V1-V2 = pi*15(8^2-3^2) = pi*15*55 = 2591.81393921157923

Answer = 2591.8 cm^3 (if rounded to tenths)

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6 0
3 years ago
Ben is showing his work in simplifying (3.9 − 9.4) − 0.6 + 6.1. Identify any error in his work or reasoning.
Serjik [45]

Answer:

Should have worked out brackets first then kept it to two subtractions (one being negative number total and the other being positive total number at step  3 ) taking you to step 4 as finish to just add the two numbers a( - 5.3)  + (5.5) = 0.2

Step-by-step explanation:

(3.9 − 9.4) − 0.6 + 6.1.  To simplify do brackets first so the first error was Step 2 line we show (3.9 − 9.4)− 0.6 + 6.1  below = to (-5 .3) − 0.6 + 6.1 Then to simplify Step 3 line there was a second error as 3.9 was never a simplification of the brackets and here is how it should be ( - 5.3)  − 0.6 + 6.1  = ( - 5.3)  + (5.5)  =   ( - 5.3)  + (5.5) Then to simplify Step 4 line we wont need a step 5 and are left to just add the two numbers ( - 5.3)  + (5.5) = 0.2

3 0
3 years ago
Read 2 more answers
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