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LenaWriter [7]
3 years ago
13

Casey polled 50 seventh grade students. He asked who they planned to vote for as class president. Thirty students said they woul

d vote for Lynne. Twenty said they would vote for Marcus.
Use this probability to predict how many seventh graders in their class of 450 students will vote for Lynne
Mathematics
1 answer:
Umnica [9.8K]3 years ago
6 0

Answer:

270 students

Step-by-step explanation:

First, you need to do a ratio.

30          x

-------  = --------

50           450

In order to solve this, you need to multiply 450 times 30 and that equals 13500. 13500 divided by 50 is 270. That means that about 270 students will vote for Lynn.

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Answer:

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Step-by-step explanation:

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7 0
3 years ago
What is the surface area of this point
Kaylis [27]

Answer:

The answer is 30ft.

Step-by-step explanation:

To find the surface area of a rectangle, we use the formula L(2) + W(2) + H(2)

Our length is 7ft

Our Width 2ft

Our height is 6ft

Let's plug our numbers into our equation:

7(2) + 2(2) +6(2)

= 14 + 4 + 12

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7 0
4 years ago
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Ira Lisetskai [31]
5 songs per commercial
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3 years ago
Y = f(x) = 16x Find f(x) when x = 1/2​
Alina [70]

Answer:

The answer depends on what the problem really is.

f(1/2) = 8

or

f(1/2) = 4

See below.

Step-by-step explanation:

This is the problem as it was posted:

y = f(x) = 16x

Let x = 1/2

y = f(1/2) = 16(1/2) = 8

Perhaps the problem is this:

y = f(x) = 16^x

If x is an exponent of 16 and not a factor, then the answer is:

y = f(\frac{1}{2}) = 16^\frac{1}{2} = \sqrt{16} = 4

5 0
3 years ago
The height of players on a football team is normally distributed with a mean of 74 inches, and a standard deviation of 1 inch. I
Andreas93 [3]

Answer:

Step-by-step explanation:

Let x be the random variable representing the height of players on the football team. Since it is normally distributed and the population mean and population standard deviation are known, we would apply the formula,

z = (x - µ)/(σ/√n)

Where

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µ = population mean

σ = standard deviation

n = number of samples

From the information given,

µ = 74 inches

σ = 1 inch

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the probability that a player is less than 74 inches tall is expressed as

P(x < 74)

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Looking at the normal distribution table, the probability corresponding to the z score is 0.5

Therefore,

P(x < 74)

The players less than 74 inches is

0.5 × 50 = 25 players

4 0
3 years ago
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