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3 years ago

Can i get help plz its not hard

Mathematics

1 answer:

Sergio [31]3 years ago

5 0

Answer:

1237 cubic feet

Step-by-step explanation:

First find the radius of the top D/2=r * r * pi

so 15/2=7.5*7.5*3.14=176.625

then multiply that by the height: 176.625*7=1236.375

So the volume of this figure is 1237 cubic feet!

Hope this helps!! :)

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What is the value of x? Enter your answer in the box. x =

Triss [41]

Answer:

x = 4.1

Step-by-step explanation:

6x-3 + 3x+6 + 5x = 60

14x + 3 = 60

14x = 60 - 3

14x = 57

x = 57/14

x = 4.1

4 0

2 years ago

An article presents voltage measurements for a sample of 66 industrial networks in Estonia. Assume the rated voltage for these n

kramer

Answer:

We accept the null hypothesis and conclude that voltage for these networks is 232 V.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 232 V

Sample mean, $\bar{x}$ = 231.5 V

Sample size, n = 66

Sample standard deviation, s = 2.19 V

Alpha, α = 0.05

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 232\\H_A: \mu \neq 232$

We use Two-tailed t test to perform this hypothesis.

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n-1}} }$ Putting all the values, we have

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Now,

$t_{critical} \text{ at 0.05 level of significance, 9 degree of freedom } = \pm 1.9971$

Since,

$|t_{stat}| > |t_{critical}|$

We accept the null hypothesis and conclude that voltage for these networks is 232 V.

4 0

2 years ago

Carla is 5 years old and Jim is 13 years younger than Peter. One year ago Peter's age was twice the sum of Carla and Jim's age.

kari74 [83]

Carla = 5 years old
Jim = 2 years old
Peter = 15 years old
(Peter was 14 years old one year ago)
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3 years ago

How to determine if x and y values represent a function?

SpyIntel [72]

Answer: set up the relation as a table or ordered pairs

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8 0

2 years ago

Mark got 14 problems wrong on his test. His score was 72% correct. How many problems were on the test? Please show work.

stira [4]

Consider that 100%-72%=28% represents the percentage of wrong answers. I would think as fractions as:
if 100% is the total number of answers and 28% are the wrong ones
as
if x is the total you have 14 wrong you can write:
$\frac{100}{28} = \frac{x}{14}$
x=(100/28)*14=50 questions

7 0

3 years ago