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2 years ago

Yo please help me on this i’ll give u a brainliest

Mathematics

2 answers:

MaRussiya [10]2 years ago

7 0

Answer:

H=3m

Step-by-step explanation:

Volume of cylinder=pir^2h

75pi=pi5^2h

75/25=h

h=3

amid [387]2 years ago

6 0

Answer:

The height is 3 m.

Step-by-step explanation:

The formula for the volume of a cylinder is V=πr^2h, where V is the volume, r is the radius and h is the height.

We are given r, the radius, and the volume, so all we need to do is plug it into the formula and solve for h, our height.

V=πr^2h

Substitute V for 75π and r for 5

75π=π5^2h

Square 5

75π=25πh

Divide by 25π on both sides

3=h

3 m is the height.

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Shawna, Dexter, and Tilana are solving the equation -2.5(5-n)+2=15. Shawna says, “I can begin by dividing each side of the equat

laila [671]

Hi!
Shawna is correct because since it's multiplied to the 5-n you have to do the opposite which is division.
Dexter is also correct because after distributing you can continue solving, there is nothing wrong with that.
Hope this helps!

4 0

3 years ago

Read 2 more answers

Given triangle PRS is congruent to triangle CFH, find the values of x, y, and z.

Mashutka [201]

Answer:

x = 23

y = 7

z = 11

Step-by-step explanation:

Since ∆PRS ≅ ∆CFH, therefore,

m<R = m<F

13y - 1 = 90° (substitution)

Add 1 to both sides

13y - 1 + 1 = 90 + 1

13y = 91

Divide both sides by 13

13y/13 = 91/13

y = 7

Since ∆PRS ≅ ∆CFH, therefore,

PS = CH

2x - 7 = 39 (substitution)

Add 7 to both sides

2x - 7 + 7 = 39 + 7

2x = 46

Divide both sides by 2

2x/2 = 46/2

x = 23

Since ∆PRS ≅ ∆CFH, therefore,

m<S = m<H

Find m<S

m<S = 180 - (m<P + m<R) (sum of ∆)

m<S = 180 - (28 + (13y - 1)) (substitution)

Plug in the value of y

m<S = 180 - (28 + (13)(7) - 1))

m<S = 180 - (28 + 91 - 1)

m<S = 180 - 118

m<S = 62°

Therefore, since m<S = m<H,

62° = 6z - 4 (substitution)

Add 4 to both sides

62 + 4 = 6z - 4 + 4

66 = 6z

Divide both sides by 6

66/6 = 6z/6

11 = z

7 0

2 years ago

You score an 80% on your test. You answer 44 questions correctly. How many questions were on the test?

Elena L [17]

Answer:

100% sure your answer is 55, there was 55 questions on the test.

8 0

2 years ago

Complete the equation of the line through<br> (-6, -5) and (-4,-4).<br> Use exact numbers.

Nutka1998 [239]

Answer:

y = $\frac{1}{2}$ x - 2

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Calculate m using the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁ ) = (- 6, - 5) and (x₂, y₂ ) = (- 4, - 4)

m = $\frac{-4+5}{-4+6}$ = $\frac{1}{2}$ , thus

y = $\frac{1}{2}$ x + c ← is the partial equation

To find c substitute either of the 2 points into the partial equation

Using (- 6, - 5), then

- 5 = - 3 + c ⇒ c = - 5 + 3 = - 2

y = $\frac{1}{2}$ x - 2 ← equation of line

7 0

2 years ago

A manufacturing plant uses light bulbs whose life spans are normally distributed, with mean and standard deviation equal to 500

meriva

Answer:

602.50 hours

Step-by-step explanation:

Given that a manufacturing plant uses light bulbs whose life spans are normally distributed, with mean and standard deviation equal to 500 and 50 hours,

It was decided to replace the bulbs so that no more than 2% of the bulbs to burn out between replacement periods

i.e. we have to construct 98% confidence interval right tailed to get this.

Z value is 2.05 for this (Upper tailed 0.98 probability)

Hence margin of error $= 2.05 (std dev)\\=2.05(50)\\= 102.50$

The upper bound for this would be

$500+102.50 =602.50$

So to keep below 2% the bulbs to burn out it should be replaced before 602.50 hours.

4 0

2 years ago