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3 years ago

8

In New York State, 48% of all teenagers own a skateboard and 39% of all teenagers own a skateboard and roller blades. and 5% of

teens own neither. What is the probability that a teenager owns roller blades?

1 answer:

Ulleksa [173]3 years ago

8 0

Answer:

18.72%

Step-by-step explanation:

39% of 48 is 18.72

Hope this helps!

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What is the constant of proportionality for the equation y=1 1/2x?

Dimas [21]

Answer:

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2 years ago

Read 2 more answers

Normal Distribution. Cherry trees in a certain orchard have heights that are normally distributed with mu = 112 inches and sigma

Lubov Fominskaja [6]

Answer:

The probability that a randomly chosen tree is greater than 140 inches is 0.0228.

Step-by-step explanation:

Given : Cherry trees in a certain orchard have heights that are normally distributed with $\mu = 112$ inches and $\sigma = 14$ inches.

To find : What is the probability that a randomly chosen tree is greater than 140 inches?

Solution :

Mean - $\mu = 112$ inches

Standard deviation - $\sigma = 14$ inches

The z-score formula is given by, $Z=\frac{x-\mu}{\sigma}$

Now,

$P(X>140)=P(\frac{x-\mu}{\sigma}>\frac{140-\mu}{\sigma})$

$P(X>140)=P(Z>\frac{140-112}{14})$

$P(X>140)=P(Z>\frac{28}{14})$

$P(X>140)=P(Z>2)$

$P(X>140)=1-P(Z$

The Z-score value we get is from the Z-table,

$P(X>140)=1-0.9772$

$P(X>140)=0.0228$

Therefore, the probability that a randomly chosen tree is greater than 140 inches is 0.0228.

5 0

3 years ago

forty years ago gasoline cost $0.30 per gallon on average. ten years ago gasoline average about $1.50 per gallon. What is the pe

DiKsa [7]

It is as 5x's as much.
<em>$0.30 X 5 = $1.50</em>
Hope I helped

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3 years ago

Can anyone help with this problem?

Lana71 [14]

Answer:

1.7

Step-by-step explanation:

7 0

2 years ago

I already made an attempt at this question and I would just like to check my answer z = ?

Salsk061 [2.6K]

So we have the equation:

$\frac{z+9}{4}=2.1$

Then we need to multiply by 4 on both sides to get rid of the denominator on the left:

$z+9=8.4$

Then we subtract 9 on both sides to solve for z:

$z=-0.6$

Therefore the answer is z = -0.6.

5 0

3 years ago