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3 years ago

What is the solution to ?

Mathematics

1 answer:

grandymaker [24]3 years ago

5 0

The solution is....................

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Library receives 823 new books on monday 312 check out on Tuersday 129 returned and 272 checked out how many are available Wedne

Lemur [1.5K]

368 books are available wednesday
823-312=511
511+129=640
640-272=368

7 0

3 years ago

58 is 16% of what number?

Diano4ka-milaya [45]

16% .......... 58

100% .......... x

Cross multiply

100*58 = 16x

5800 = 16x

x = 5800/16

x = 362

I hope that's help !

8 0

4 years ago

A survey of 32 different gas stations in Texas found the average price of gasoline to be $3.19 a gallon with a sample standard d

Leni [432]

Answer:

The value of test statistic is -4.1247

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = $3.26 a gallon

Sample mean, $\bar{x}$ = $3.19 a gallon

Sample size, n = 32

Sample standard deviation, σ = $0.096

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 3.26\text{ dollars a gallon}\\H_A: \mu < 3.26\text{ dollars a gallon}$

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

Formula:

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

Putting all the values, we have

$t_{stat} = \displaystyle\frac{3.19 - 3.26}{\frac{0.096}{\sqrt{32}} } = -4.1247$

Thus, the value of test statistic is -4.1247

3 0

3 years ago

The weights of cars passing over a bridge have a mean of 3,550 pounds and standard deviation of 870 pounds. Assume that the weig

Annette [7]

Answer:

0.24315

Step-by-step explanation:

Using the z score formula to solve this question

z = (x - μ) / σ,

Such that:

x = raw score

μ = population mean

σ = population standard deviation.

From the question:

x = 3000

μ = 3550

σ = 870

z = (3000 - 3550) / 870

z = -550/870

z = -0.6962

Using the z score table as well as probability calculator(as requested in the question to find the z score)

The probability of having less than 3000 is obtained as:

P(x<3000) = 0.24315

7 0

3 years ago

The graph of the function f(x) = (x + 6)(x + 2) is shown.

ioda

Answer:

The axis of symmetry is x = -4

The function is negative over (-6, -2)

3 0

3 years ago

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