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stiks02 [169]
3 years ago
13

Find the volume of a cylinder with diameter = 21cm and height = 15cm. Round your answer to the nearest cm3.

Mathematics
1 answer:
Ymorist [56]3 years ago
5 0

Answer:

the answer is C

Step-by-step explanation:

V=πxhxr^2

V=πx15x10.5^2

V=πx15x110.25

V=47.1x110.25

V=5195cm3

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Given that 2^x = 7, find the value of 4^x-1.
Helga [31]

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If\ is\ 4^{x-1},\ then\\\\4^{x-1}=\dfrac{4^x}{4}=\dfrac{49}{4}=12\frac{1}{4}

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PLS ANSWER NOW WILL EARN BRAINLIEST IF RIGHT
velikii [3]

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8 0
3 years ago
The Garzas plan to invest $2,000 for 5 years. What annual simple interest rate must the investment earn in order for the Garzas
insens350 [35]

Answer:

r=20%

Step-by-step explanation:

we know that

The simple interest formula is equal to

A=P(1+rt)

where

A is the Final Investment Value

P is the Principal amount of money to be invested

r is the rate of interest  

t is Number of Time Periods

in this problem we have

t=5\ years\\ P=\$2,000\\ A=\$4,000\\r=?

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