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Papessa [141]
2 years ago
5

Find the interest earned on a $125 investment at a 7.5% simple interest rate for 6 months? Use the formula I = Prt.

Mathematics
2 answers:
fredd [130]2 years ago
8 0
$5,625 is the correct answer for this because of the additional
katovenus [111]2 years ago
3 0
The answer is $5,625
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Kelly uses a building block to create the top of a tower. The front face of the building block is shown.
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The range of the function f(x) = x + 5 is {7, 9}. What is the function’s domain?
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** x + 5 = 7 x = 2 ** x + 5 = 9 x = 4 {2,4}
4 0
3 years ago
15% of what number is equal to 9
just olya [345]
The percentage of 15% of 9 is 60% (I think)
8 0
2 years ago
Read 2 more answers
A manager of a grocery store wants to determine if consumers are spending more than the national average. The national average i
strojnjashka [21]

The valid conclusions for the manager based on the considered test is given by: Option

<h3>When do we perform one sample z-test?</h3>

One sample z-test is performed if the sample size is large enough (n  > 30) and we want to know if the sample comes from the specific population.

For this case, we're specified that:

  • Population mean = \mu = $150
  • Population standard deviation = \sigma = $30.20
  • Sample mean = \overline{x} = $160
  • Sample size = n = 40 > 30
  • Level of significance = \alpha = 2.5% = 0.025
  • We want to determine if the average customer spends more in his store than the national average.

Forming hypotheses:

  • Null Hypothesis: Nullifies what we're trying to determine. Assumes that the average customer doesn't spend more in the store than the national average. Symbolically, we get: H_0: \mu_0 \leq \mu = 150
  • Alternate hypothesis: Assumes that customer spends more in his store than the national average. Symbolically H_1: \mu_0 > \mu = 150

where \mu_0 is the hypothesized population mean of the money his customer spends in his store.

The z-test statistic we get is:

z = \dfrac{\overline{x} - \mu_0}{\sigma/\sqrt{n}} = \dfrac{160 - 150}{30.20/\sqrt{40}} \approx 2.094

The test is single tailed, (right tailed).

The critical value of z at level of significance 0.025 is 1.96

Since we've got 2.904 > 1.96, so we reject the null hypothesis.

(as for right tailed test, we reject null hypothesis if the test statistic is > critical value).

Thus, we accept the alternate hypothesis that customer spends more in his store than the national average.

Learn more about one-sample z-test here:

brainly.com/question/21477856

3 0
1 year ago
Read 2 more answers
Solve for x: 2(3x -6) - 3(2x - 1)
lys-0071 [83]

Answer:

I don't know what you are saying for solve for x though if your saying simplify

simplify answer: -9

If 2(3x-6) = 3 (2x-1) answer: No solution

If 2(3x-6) = -3 (2x-1) answer: x = 1.25

Step-by-step explanation:

8 0
2 years ago
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