Answer: 7 π r² + π r³
Explanation:
1) The general formula for the volumen, V, of a cylinder with radius r and height h is:
V = π r² h
2) Now you have the condition that the height is 7 inches greater than the radius, that is:
h = 7 + r
3) Replace h with its expression
V = π r² (7 + r)
4) Expand the product (use distributive property):
V = π (7r²) + π r³ = 7 π r² + π r³
Answer: 7 π r² + π r³
Answer:
x=18
Step-by-step explanation:
21:28=x:24
1. rewrite: 21/28 = x/24
2. simplify: 3/4=x/24
3. multiply 24 to both sides: x=18
Answer:
Step-by-step explanation:
The average value of all the pennies, nickels, dimes, and quarters in Paula's purse is 20 cents. If she had one more quarter, the average value would be 21 cents. How many dimes does she have in her purse
A single appliance has 6 widgets, and a widget has 7 bolts. Therefore, you need to multiply 6 by 7 to find the number of bolts in a single appliance.
6 x 7 = 42
Now that you know the number of bolts in an appliance, you can find the number of bolts in 20 appliances by multiplying 42 by 20.
42 x 20 = 840
Hence, there are 840 bolts in 20 appliances.
Answer:
See Explanation
Step-by-step explanation:
<em>The question is incomplete, as the required clocks are not given.</em>
<em>To answer this question, I will give an illustration of how to calculate the difference between times.</em>
<em>Note that: I assume you can read the time on a clock</em>
<em></em>
Assume that:
The difference is calculated as:
From 2:15pm to 3:05pm is 50 minutes.
So:
Another assumption:
The difference is calculated as:
For ease of calculation, we split the time to 2.
(1) From 2:15pm to 3:15pm
(2) From 3:15pm to 3:32pm
(1) From 2:15pm to 3:15pm: This is 1 hour
(2) From 3:15pm to 3:32pm: This is 17 minutes (i.e. 32 - 15)
So, the difference is:
