2 years ago

Please answer this!!

Mathematics

1 answer:

Arturiano [62]2 years ago

8 0

The answer is C, because all those numbers equal 12 :)

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If 50 percent of x=66 then x =

sasho [114]

Answer:

132

Step-by-step explanation:

50 % means half

so 66 is half of whatever x is.

to find x you have to multiply 66 by 2 or add 66 to 66 which will give you 132 either way.

<em>Hope this helps you! have an amazing day :)</em>

7 0

3 years ago

Read 2 more answers

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3 years ago

The calibration of a scale is to be checked by weighing a 13 kg test specimen 25 times. Suppose that the results of different we

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Solution :

a).

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Weight, μ = 13 kg

Therefore the hypothesis should be tested are :

$H_0 : \mu = 13$

$H_a : \mu \neq 13$

b). When the value of $\overline x = 12.84$

Test statics :

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$Z=\frac{(14.82-13)}{\frac{0.2}{\sqrt {25}}}$

$=\frac{1.82}{0.04}$

= 45.5

P-value = 2 x P(Z > 45.5)

= 2 x 1 -P (Z < 45.5) = 0

Reject the null hypothesis if P value < α = 0.01 level of significance.

So reject the null hypothesis.

Therefore, we conclude that the true mean measured weight differs from 13 kg.

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3 years ago

The table shows list of walking trails in the United States. Latisha walked the KATY trail six days last week. How many miles di

myrzilka [38]

How long is the trail on your table then multiply by 6.

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3 years ago

Desmond paid 8.5% sales tax when he bought a new phone. The sales tax was $12.75. What was the cost of the phone, without tax? *

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Answer: 150$

Step-by-step explanation:

12.75 / 8.5%

6 0

3 years ago

Please answer this!!​

Please answer this!!