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andriy [413]
3 years ago
14

Reese has nickels and dimes in his pocket. He counts a total of 11 coins. The total value of his pocket change is 70 cents.

Mathematics
2 answers:
tensa zangetsu [6.8K]3 years ago
6 0

Your answer is B D, I am pretty sure

MariettaO [177]3 years ago
4 0

Answer:B and D

Step-by-step explanation:

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(1) A manufacturer of tires believes that their mean time to failure (MTTF) is 20 613 km. They also believe that time to failure
ELEN [110]

Answer:

a) The probability of falling in the warranty period is 11.6%.

b) The warranty period need to be 19771 km to ensure that no more than 5 per cent of tires fail in the warranty period.

Step-by-step explanation:

a) To fall within the warranty period, the tire has to fail before the 20,000 km.

To calculate the probability, we first calculate the z-value:

z=\frac{X-\mu}{\sigma}=\frac{20000-20613}{512}=  \frac{-613}{512}= -1.197

Then, the probability of falling in the warranty period is:

P(X

b) To calculate this we have to go on from a P(z<z₁)=0.05. This happens for z=-1.645.

This corresponds to a value X of:

X=\mu+z*\sigma=20613+(-1.645)*512=20613-842=19771

The warranty period need to be 19771 km to ensure that no more than 5 per cent of tires fail in the warranty period.

5 0
3 years ago
Square root of 55 to the nearest integer
MariettaO [177]
The nearest integer is 7 because the nearest perfect square root is 49. Answer is 7-8
5 0
3 years ago
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What is rank correlation?​
Irina-Kira [14]

Step-by-step explanation:

it's any of several statistics that measure an ordinal association. Measures the degree of similarity between two rankings.

6 0
2 years ago
1.2(4x – 1) = 8x – 2
zysi [14]

6x

Step-by-step explanation:

1.2(4x-1)=8x-2=6x

3 0
2 years ago
I have no idea please help
melamori03 [73]
22. Alternate angles

23. 4: (h_{b} = 2 \frac{a}{b}, substitute b with 10 and a with 20 and you get 4.)

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3 years ago
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