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2 years ago

Suppose that your statistics professor tells you that the scores on a midterm exam were approximately

Mathematics

1 answer:

DedPeter [7]2 years ago

5 0

Answer:

Step-by-step explanation:

z-score representing 85% is 1.04 (from table)

Let x be the score representing the lower limit of 85%.

Use the formula to find z-scores:

z = (x - μ)/σ

We have:

z = 1.04, μ = 78, σ = 7

Substitute the values and solve for x:

1.04 = (x - 78)/7
x - 78 = 7.28
x = 85.28

The lower limit of the top 15% is 85.28.

Since your score is greater than 85.28 you earned an A

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One week, Kerry travels 125 miles and uses 5 gallons of gasoline. The next week, she travels 175 miles and uses 7 gallons of gas

bazaltina [42]

This is good information, but the question part is missing. Put the question in the comments and I'll try my best to help!

6 0

2 years ago

A solid toy is in the form of a hemisphere surmounted by a right circular cone. The height of the cone is 4 cm and diameter of t

docker41 [41]

Answer:

See below ~

Step-by-step explanation:

Things to Find

Volume of Toy
Difference of Volumes in Cube and Toy
Total Surface of Toy

Volume of Toy

Volume of Hemisphere + Volume (Cone)
2/3πr³ + 1/3πr²h
1/3πr² (2r + h)
1/3 x 3.14 x 16 (8 + 4)
1/3 x 50.24 x 12
50.24 x 4
200.96 cm³

Volume of Circumscribing Cube

Edge length is same as diameter
V = (8)³
V = 512 cm³

Difference in Volume

512 - 200.96
311.04 cm³

Slant height of cone

l² = 4² + 4²
l² = 32
l = 4√2 cm = 5.6 cm

Surface Area of Toy

CSA (hemisphere) + CSA (Cone)
2πr² + πrl
πr (2r + l)
3.14 x 4 (8 + 5.6)
12.56 x 13.6
170.8 cm²

3 0

1 year ago

What is this Margo find as many rectangles as she can with the pier made it a 14 cm

Brut [27]

What do you mean by that

3 0

3 years ago

What is the volume of a block of ice measuring 3 meters long, 1.5 meters wide, and 2 meters high? A. 900 cu. m B. 12 cu. m C. 9

lutik1710 [3]

To find volume of a rectangular prism, you simply need to multiply length times width times height. We know from the text that our block of ice is 3 meters long, 1.5 meters wide, and 2 meters high. So all we need to do is multiply:

3 * 1.5 = 4.5

4.5 * 2 = 9

The block of ice has a volume of 9 cubic meters.
Choice C is your correct answer.
Hope that helped! =)

4 0

3 years ago

Read 2 more answers

<img src="https://tex.z-dn.net/?f=-8%5E%5Cfrac%7B1%7D%7B3%7D" id="TexFormula1" title="-8^\frac{1}{3}" alt="-8^\frac{1}{3}" align

Charra [1.4K]

9514 1404 393

Answer:

-2

Step-by-step explanation:

-8^(1/3) = -(2^3)^(1/3) = -(2^(3/3)) = -2

6 0

2 years ago