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3 years ago

If you can choose one scoop of ice cream and one topping, how many different sundaes can you make?

Mathematics

2 answers:

34kurt3 years ago

7 0

It's 2 one with a topping and one with out

shepuryov [24]3 years ago

5 0

Answer:

I believe there is something wrong with ur question.

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Jess gave her a $4.90 tip. The tip was 7% of the cost of the . Write an equation to find b, the cost of the Manicure

Naddik [55]

The formula to finding percentages is x% * y = c. So 7% of $4.90 is 0.343.
( 7% is 0.07)

4 0

2 years ago

You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard devia

gtnhenbr [62]

Answer:

$n=(\frac{2.58(58.2)}{1})^2 =22546.82 \approx 22547$

So the answer for this case would be n=22547 rounded up to the nearest integer

Step-by-step explanation:

Let's define some notation

$\bar X$ represent the sample mean

$\mu$ population mean (variable of interest)

$\sigma=58.2$ represent the population standard deviation

n represent the sample size

$ME =1$ represent the margin of error desire

The margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (a)

And on this case we have that ME =+1 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (b)

The critical value for 99% of confidence interval now can be founded using the normal distribution. The significance would be $\alpha=0.01$ and the critical value $z_{\alpha/2}=2.58$ , replacing into formula (b) we got:

$n=(\frac{2.58(58.2)}{1})^2 =22546.82 \approx 22547$

So the answer for this case would be n=22547 rounded up to the nearest integer

3 0

3 years ago

Samantha went shopping for a new dress. Last week she saw it being sold for $75. When she returned to the store today, she saw t

lions [1.4K]

Answer:

Step-by-step explanation:

20%

3 0

3 years ago

Read 2 more answers

For a statistics class project, a college student randomly samples 75 men who exercise at a gym regularly and 68 women who exerc

raketka [301]

Answer:

iii. The data do not provide sufficient evidence to conclude that the mean number of minutes exercised per week is larger for men than for women at this gym

Step-by-step explanation:

1) The hypotheses are

H0: u1 ≤ u2 against the claim Ha: u1 > u2

The men spend less or equal time than the women at the gym each week

the men spend greater time than the women at the gym each week

2) The test statistic is

t= (x1`- x2`) / √ s1²/n1+ s2²/n2

t= 65.7- 64.8/√(13.9)²/75 + (9.6)²/68

t= 0.9/√2.57613 +1.35529

t=0.4539

and the degrees of freedom is

3) υ = [s₁²/n1 + s₂²/n2]²/ (s₁²/n1 )²/ n1-1 + (s₂²/n2)²/n2-1

=[(13.9)²/75 + (9.6)²/68]²/ [(13.9)²/75 ]² /74 + [ (9.6)²/68]²/67

= 139

The degrees of freedom is always rounded in this calculation

4) The Critical region is [1.656, ∞]

5) t-score is outside of the critical region, so there is not enough evidence to reject H₀.

iii. The data do not provide sufficient evidence to conclude that the mean number of minutes exercised per week is larger for men than for women at this gym

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2 years ago

A ladder is 80 inches tall. How tall is it in feet and inches?

Veseljchak [2.6K]

Answer:

6'8

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers