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anastassius [24]
2 years ago
8

NEED HELP ASAP PLEASE!!

Mathematics
1 answer:
Dimas [21]2 years ago
3 0
Hope this helps, btw i’m so bad at math but i found the answer from the app gauth.math

Answer:
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15.867

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Step-by-step explanation:

5 0
3 years ago
I will give.help please
Rudik [331]

Answer:

74.94×10^3= 74940 because the number 10³ has 3 zeros when it is written without an exponent.

Step-by-step explanation:

when times 10, you move the decimal point to the right.

6 0
2 years ago
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A large adult elephant weights 24,000 pounds. A baby elephant, on the other hand, weights only 260 pounds. How much more does th
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24,000- 260 would equal 23,740 pounds
8 0
2 years ago
An appliance manufacturer claims to have developed a compact microwave oven that consumes a mean of no more than 250 W. From pre
melamori03 [73]

Answer:

We conclude that a compact microwave oven consumes a mean of more than 250 W.

Step-by-step explanation:

We are given that an appliance manufacturer claims to have developed a compact microwave oven that consumes a mean of no more than 250 W with a population standard deviation of 15 W.

They take a sample of 20 microwave ovens and find that they consume a mean of 257.3 W.

Let \mu = <u><em>mean power consumption for microwave ovens.</em></u>

So, Null Hypothesis, H_0 : \mu \leq 250 W     {means that a compact microwave oven consumes a mean of no more than 250 W}

Alternate Hypothesis, H_A : \mu > 250 W     {means that a compact microwave oven consumes a mean of more than 250 W}

The test statistics that would be used here <u>One-sample z test statistics</u> as we know about the population standard deviation;

                                T.S. =  \frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n} } }  ~ N(0,1)

where, \bar X = sample mean power consumption for ovens = 257.3 W

            σ = population standard deviation = 15 W

            n = sample of microwave ovens = 20

So, <em><u>the test statistics</u></em>  =  \frac{257.3-250}{\frac{15}{\sqrt{20} } }

                                      =  2.176

The value of z test statistics is 2.176.

<u>Now, at 0.05 significance level the z table gives critical value of 1.645 for right-tailed test.</u>

Since our test statistic is more than the critical value of t as 2.176 > 1.645, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region due to which <u>we reject our null hypothesis</u>.

Therefore, we conclude that a compact microwave oven consumes a mean of more than 250 W.

7 0
3 years ago
250% of a number is 60. What is the number
katrin [286]

60 / 2.50 = 24

the number is 24

7 0
3 years ago
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