2 years ago

2/5 of a number is what percent of that number

Mathematics

1 answer:

aalyn [17]2 years ago

4 0

Answer:

40%.

Step-by-step explanation:

2/5 = 40%.

Please let me or another Brainly user know if you need further assistance. Thanks!

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Letter C is your answer.

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3 years ago

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A researcher is testing a hypothesis of a single mean. The critical z value for a = .05 and a two‑tailed test is +1.96. The obse

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Answer:

The decision made by the researcher based on this information is to reject the null hypothesis.

Step-by-step explanation:

Two-tailed hypothesis test:

Critical value: $z_c$

Test statistic: z

If $|z| < |z_c|$ , we do not reject the null hypothesis.

If $|z| > |z_c|$ , we reject the null hypothesis.

In this question:

$z_c = 1.96, z = -2.05, |z| = 2.05$

Since $|z| > |z_c|$ , we reject the null hypothesis.

The decision made by the researcher based on this information is to reject the null hypothesis.

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2 years ago

the mean of normally distributed test scores is 80 and the standard division is 5. If there are 186 test scores in the data samp

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Answer:

Step-by-step explanation:

score 75 is one standard dev below the mean ====>to the mean encompasses approx 34% of scores

.34 * 186 = 63

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1 year ago

If f(x) = -2x^2 + 3 then f(-5) = ??

Sladkaya [172]

F(-5)= -2x^2+3

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25*-2=-50

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F=-47

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2 years ago

2. Generalize How is adding and subtracting

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Answer:

adding and subtracting decimals is similar to adding and subtracting decimals because for both you add and sub both #s

Step-by-step explanation:

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3 years ago