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Airida [17]
3 years ago
9

A display case of sweaters are marked 3 for $44. If Betty wants to buy 21 sweaters, how much will Betty spend (not including tax

)?
Mathematics
1 answer:
lukranit [14]3 years ago
6 0

Answer:

308$

Step-by-step explanation:

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It's 0.41961.

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3 years ago
Jaydon has eaten 3.6% his 45 ounce block of chocolate
elena-s [515]

Answer:

The answer is 1.62 ounce

Step-by-step explanation:

<h3><u>Given</u>;</h3>
  • Jaydon has eaten 3.6% of his 45 ounce block of chocolate fudge.
<h3><u>T</u><u>o</u><u> Find</u>;</h3>
  • How many ounces of fudge has he eaten?

Now,

3.6% of his 45 ounce

45 × 3.6 ÷ 100

162 ÷ 100 = 1.62

Thus, Jaydon has eaten 1.62 ounce block of chocolate fudge.

4 0
2 years ago
6. If ABCD is a square and AD = 11. find each missing value.
MAVERICK [17]

Answer:

All sides will be 11 and all angles will be 90 degrees.

Step-by-step explanation:

As all sides of square are equal. And all angles are right angled.

Hope it helped!!

3 0
3 years ago
A statistics practitioner in a large university is investigating the factors that affect salary of professors. He wondered if ev
Ulleksa [173]

Answer:

Step-by-step explanation:

Hello!

Given the linear regression of Y: "Annual salary" as a function of X: "Mean score on teaching evaluation" of a population of university professors. It is desired to study whether student evaluations are related to salaries.

The population equation line is

E(Y)= β₀ + β₁X

Using the information of a n= 100 sample, the following data was calculated:

R²= 0.23

                Coefficient    Standard Error  

Intercept    25675.5           11393

x                  5321                  2119

The estimated equation is

^Y= 25675.5 + 5321X

Now if the interest is to test if the teaching evaluation affects the proffesor's annual salary, the hypotheses are:

H₀: β = 0

H₁: β ≠ 0

There are two statistic you can use to make this test, a Student's t or an ANOVA F.

Since you have information about the estimation of  β you can calculate the two tailed t test using the formula:

t= \frac{b - \beta }{\frac{Sb}{\sqrt{n} } } ~t_{n-2}

t= \frac{ 5321 - 0 }{\frac{2119}{\sqrt{100} } } = 25.1109

The p-value is two-tailed, and is the probability of getting a value as extreme as the calculated t_{H_0} under the distribution t_{98}

p-value < 0.00001

I hope it helps!

3 0
3 years ago
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