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3 years ago

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Please I need correct answer

1 answer:

Tcecarenko [31]3 years ago

5 0

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A group of students at a school takes a history test. The distribution is normal with a mean of 25, and a standard deviation of

Anna [14]

Answer:

27.1

Step-by-step explanation:

Given:

mean=25

standard deviation=4

z0.70=0.525

$z=\frac{x-mean}{standard deviation}$

z*sd = x-mean= 2.1

the lowest score for the top 30%: x=27.1

8 0

3 years ago

Which one should I be picking

Lina20 [59]

Answer:

8 cm

Step-by-step explanation:

7 0

3 years ago

Put the following Points on a plane.

jeka57 [31]

Answer:

A (3, 1/2) B (-3/2, -7/4) C (7/5, 9/2)

Just a helpful tip for next time you need to graph something, you can look up "Graph Generator" and click on one of the first couple links and then you can put in your points. It makes it easier on the brain to be able to see and understand an accurate, and clean graph with the points on it.

8 0

3 years ago

A triangular prism. The rectangular sides are 3 feet by 2 feet, 3 feet by 2.5 feet, and 3 feet by 1.5 feet. The 2 triangular sid

Brrunno [24]

The amount of plywood that he needs to buy will be 21 square feet.

<h3>What is the surface area of the triangular prism?</h3>

Let the prism with a length of L of the rectangular surface.

And the dimension of the triangle is A, B, and C. Then we have

SA = 2(area of triangle) + 3(area of rectangle surface)

A triangular prism.

The rectangular sides are 3 feet by 2 feet, 3 feet by 2.5 feet, and 3 feet by 1.5 feet.

The 2 triangular sides have a base of 2 feet and a height of 1.5 feet.

Then the area of the triangle will be

⇒ 1/2 x 2 x 1.5

⇒ 1.5 square feet

The area of the rectangles will be

⇒ 3 x 2 + 3 x 2.5 + 3 x 1.5

⇒ 18 square feet

Then the surface area of the triangular prism will be

Surface area = 2 x 1.5 + 18

Surface arae = 3 + 18

Surface area = 21 square feet

More about the surface area of the triangular prism link is given below.

brainly.com/question/16765719

#SPJ1

7 0

3 years ago

What is 7/9 devided by 1/3

eduard

Answer:

$\frac{7}{3}$

Step-by-step explanation:

$\frac{7}{9}$ ÷ $\frac{1}{3}$ = Flip the second fraction over (reciprocal) and multiply

$\frac{7}{9}$ x $\frac{3}{1}$ = Multiply straight across. Numerators then denominators.

$\frac{7}{9}$ x $\frac{3}{1}$ = $\frac{21}{9}$ = $\frac{7}{3}$ Reduce.

8 0

3 years ago

Read 2 more answers