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Goryan [66]
2 years ago
15

Please help with c d and e

Mathematics
1 answer:
natka813 [3]2 years ago
8 0

Answer:

eeeeeeeeee

Step-by-step explanation:

correct

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Rachel mom 5 lawns in 8 hours at this rates how many can she mom in 40 hours
TEA [102]

Answer:

25

Step-by-step explanation:

  • 8times5 is 40
  • 8h is 5 lawns
  • 5 times 5 is 40
5 0
2 years ago
Brand name producers of aspirin claim that one advantage of their aspirin over generic aspirin is that brand name aspirin is muc
11Alexandr11 [23.1K]

Answer:

Step-by-step explanation:

The claim here is that the brand name aspirin is more consistent in the amount of active ingredient used than the generic aspirin.

This is a test of 2 independent groups. The population standard deviations are not known. Let μ1 be the mean amount of active ingredients in brand name aspirin and μ2 be the mean amount of active ingredients in generic name aspirin

The random variable is μ1 - μ2 = difference in the mean amount of active ingredients between the brand name and generic aspirin

We would set up the hypothesis.

The null hypothesis is

H0 : μ1 ≥ μ2 H0 : μ1 - μ2 ≥ 0

The alternative hypothesis is

H1 : μ1 < μ2 H1 : μ1 - μ2 < 0

This is a left tailed test

Since sample standard deviation is known, we would determine the test statistic by using the t test. The formula is

(x1 - x2)/√(s1²/n1 + s2²/n2)

From the information given,

x1 = 325.01

x2 = 323.47

s1 = 10.12

s2 = 11.43

n1 = 200

n2 = 180

t = (325.01 - 323.47)/√(10.12²/200 + 11.43²/180)

t = 1.24

1.237877

The formula for determining the degree of freedom is

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

df = [10.12²/200 + 11.43²/180]²/[(1/200 - 1)(10.12²/200)² + (1/180 - 1)(11.43²/180)²] = 1.53233946713/0.00537245359

df = 285

We would determine the probability value from the t test calculator. It becomes

p value = 0.108

Since alpha, 0.025 < than the p value, 0.108, then we would fail to reject the null hypothesis. Therefore, at 2.5% level of significance, these data support the brand name producers claim

5 0
3 years ago
Of 15 possible​ books, you plan to take 7 with you on vacation. How many different collections of 7 books can you​ take?
cestrela7 [59]
Am I the only one that doesn’t get what the question is asking
I feel like 1 piece of information is missing

Like how much in a collection?
7 0
2 years ago
Read 2 more answers
You spin the spinner and flip a coin. Find the probability of the compound event.
frozen [14]
2/4
hope that helps !!
5 0
3 years ago
Read 2 more answers
Factor completely x3 – 8
Travka [436]

Answer: (x-2) (x^2 + 2x + 4)

Step-by-step explanation:

x^3 - 8

x^3 - 2^3

(x-2) * (x^2+x * 2 + 2^2)

(x-2) (x^2 + 2x + 4)

3 0
3 years ago
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