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2 years ago

Samuel has a collection of toy cars. His favorites are the 27 red ones which make up 60%, percent of his collection.

1 answer:

4 0

I'm just gonna assume that the question is what's the total number of cars he has/ the other part of his collection

His whole collection has 45 cars in it. I got that by multiplying 60% by 27

the other 40% of his collection is made up of 18 cars

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Is 144 a perfect square or not

Rina8888 [55]

Answer: Yes

Step-by-step explanation: 144 is a perfect square. In other words, it's possible to find a whole number that can be multiplied by itself that gives us 144.

In this case, we multiply 12 by 12 or 12² to get 144 which means 144 is a perfect square. Also, it's on our perfect square list which I will attach below.

6 0

2 years ago

An SRS of size 20 is drawn from a population that has a normal distribution. The sample has a mean of 122.5 and a standard devia

Tems11 [23]

Answer:

The value is $\sigma_{\= x} = 1.789$

Step-by-step explanation:

From the question we are told that

The sample size is n = 20

The sample mean is $\= x = 122.5$

The standard deviation is $s = 8$

Generally the standard error of the mean is mathematically represented as

$\sigma_{\= x} = \frac{s}{\sqrt{n} }$

=> $\sigma_{\= x} = \frac{8}{\sqrt{20 } }$

=> $\sigma_{\= x} = 1.789$

8 0

2 years ago

What Is the dependent variable the shoe size or the height

Maurinko [17]

Answer:

The dependent variable is the shoe size

Step-by-step explanation:

7 0

2 years ago

A study was conducted to see if students given extra oxygen prior to taking the SAT could improve their scores. It was found tha

erik [133]

Answer:

Hypothesis testing of ' significance of difference between means'

Step-by-step explanation:

Study conducted to tests whether oxygen level prior SAT score improves test score. This can be done through - Hypothesis testing of ' significance of difference between means'.

Where x1 & x2 represent mean values of SAT test score before (or without) & after (or with) oxygen.

Null hypothesis [H0] = x1 = x2 , Alternate Hypothesis [H1] : x1 < x2

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2 years ago

The diameter of a basketball is about 19 inches what is the volume of the basketball

egoroff_w [7]

<span>2019.118125
the formula for volume of a sphere is v=.75(pi)r³</span>

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2 years ago