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3 years ago

PLEASE I NEED HELP ASAP ITS ALMOST DUE

Mathematics

1 answer:

Liula [17]3 years ago

5 0

I would THINK it’s 9???? I’m not sure

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Help solve for surface area btw

spayn [35]

SA=2lw+2lh+2hw ..........

7 0

2 years ago

Eric has saved $18,300 toward a down payment on a house. He makes a salary of $59,750 a year. What is the maximum Eric could spe

dimaraw [331]

The answer should be B) $119,500. The benchmark is his annual salary, and this amount is twice his annual salary, but not thrice larger. For mortgages, your debt should generally not be larger than three times your gross annual salary.

5 0

3 years ago

Read 2 more answers

5. The superintendent of the local school district claims that the children in her district are brighter, on average, than the g

anygoal [31]

Answer:

We conclude that children in district are brighter, on average, than the general population.

Step-by-step explanation:

We are given the following data set:

105, 109, 115, 112, 124, 115, 103, 110, 125, 99

Formula:

$\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}$

where $x_i$ are data points, $\bar{x}$ is the mean and n is the number of observations.

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$Mean =\displaystyle\frac{1117}{10} = 111.7$

Sum of squares of differences = 642.1

$S.D = \sqrt{\frac{642.1}{49}} = 8.44$

We are given the following in the question:

Population mean, μ = 106

Sample mean, $\bar{x}$ = 111.7

Sample size, n = 10

Alpha, α = 0.05

Sample standard deviation, s = 8.44

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 106\\H_A: \mu > 106$

We use one-tailed(right) t test to perform this hypothesis.

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }$

Putting all the values, we have

$t_{stat} = \displaystyle\frac{111.7 - 106}{\frac{8.44}{\sqrt{10}} } = 2.135$

Now,

$t_{critical} \text{ at 0.05 level of significance, 9 degree of freedom } = 1.833$

Since,

$t_{stat} > t_{critical}$

We fail to accept the null hypothesis and reject it. We accept the alternate hypothesis.

We conclude that children in district are brighter, on average, than the general population.

4 0

3 years ago

.35 convert into pecentage

Whitepunk [10]

.35 as a percentage would be 35%.

.35 = 35 / 100 as a fraction

7 0

3 years ago

Please help ASAP 15 POINTS BRAINIEST ANSWER!!

maxonik [38]

1) around 1300

2) around 30

3) a. about 500
b. about 2600

Hope this helps you!

7 0

3 years ago