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2 years ago

9

SAT exams are from a Normal distribution with a mean of 1000 and a standard deviation of 200. What SAT score is in the 90th perc

entile?

1 answer:

Ivahew [28]2 years ago

3 0

Answer:

800

Step-by-step explanation:

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A family worked all day building a sandcastle on the beach. As they were building the castle they recorded the number of pails o

LiRa [457]

Answer:

15708 cubic inches

Step-by-step explanation:

The formula for a cylandir is V=πr^2h, substitute in your known factors and multiply by 20 for the 20 pails used and you get your answer.

5 0

1 year ago

Sydney bought a 4-pound bag of brown rice at the grocery store. The nutritional information showed that the bag

FromTheMoon [43]

Answer:

1.72973 oz/serving. Perhaps round to 1.73 oz, although there is only 1 sig fig in "4-pound bag." But the problem states "exactly."

Step-by-step explanation:

We want oz/serving, so let's convert the pounds of rice to total ounces of rice:

We are told that 16 oz = 1 pound. Make that a conversion factor: (16 oz/1 pound)

(4 pounds)*((16 oz/1 pound) = 64 ounces

We are told that 4 pounds (64 ounces) makes 37 servings. So:

(64 ounces)/(37 servings) = 1.72973 oz/serving

5 0

1 year ago

How many squares make up the surface of a cube?<br>O A. Seven<br>O B. Five<br>O C. Six<br>D. Eight

Blababa [14]

The answer to the question is C (6)

3 0

2 years ago

Read 2 more answers

Question 16 (Essay Worth 7 points)<br><br> Verify the identity.<br><br> tan (x + π/2) = -cot x

Rus_ich [418]

Step-by-step explanation:

We know that tan=sin/cos, so tan(x+π/2)=

$\frac{sin(x+pi/2)}{cos(x+pi/2)}$

Then, we know that sin(u+v)=sin(u)cos(v)+cos(u)sin(v),

so our equation is then

$\frac{sin(x)cos(\pi/2)+cos(x)sin(\pi/2)}{cos(x+\pi/2)} = \frac{cos(x)}{cos(x+\pi/2) }$

Then, cos(u+v)=cos(u)cos(v)-sin(u)sin(v), so our expression is then

$\frac{cos(x)}{cos(x)cos(\pi/2)-sin(x)sin(\pi/2)} = \frac{cos(x)}{-sin(x)} = -cot(x)$

6 0

2 years ago

Determine if the angles are greater than (>), less than (<), or equal (=) to each other.

Gwar [14]

Opposite side to <WYX=WX
Opposite side to <XWY=XY

Here

WX=12
XY=15

As

WX<XY

$\\ \sf\longmapsto$

4 0

2 years ago