Solve.

Mathematics

1 answer:

Wewaii [24]3 years ago

3 0

Answer:

They have spent $75

16+14 = 30

30 x 2.50 = 75

Step-by-step explanation:

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A. Find the unit price for each option shown below. Round to the nearest cent when necessary. Option I: 10 candy bars for $6.75

kipiarov [429]

The unit price for option 1 is $0.68 for each candy bar. The unit price for option 2 is $0.60. So you would be getting more candy bars for your money with the second option. I hope this helps!

3 0

4 years ago

Jessica walked to a toy store in the morning and, after browsing for 6 minutes, decided to buy a video game for $2.46. Jessica h

zhenek [66]

Jessica got $0.43. Because 2.89 - 2.46 = 0.43. Hope this helps.

4 0

3 years ago

Families USA, a monthly magazine that discusses issues related to health and health costs, survey 19 of its subscribers. It foun

s344n2d4d5 [400]

Answer:

$10,151 $< \mu$ $11448.12

$n = 158$

Step-by-step explanation:

From the question we are told that

The sample size is n = 19

The sample mean is $\= x =$ $10,800

The standard deviation is $\sigma =$ $1095

The population mean is $\mu =$ $225

Given that the confidence level is 99% the level of significance is mathematically represented as

$\alpha = 100 -99$

$\alpha = 1$ %

=> $\alpha = 0.01$

Now the critical values of $\alpha = Z_{\frac{\alpha }{2} }$ is obtained from the normal distribution table as

$Z_{\frac{0.01}{2} } = 2.58$

The reason we are obtaining values for $\frac{\alpha }{2}$ is because $\alpha$ is the area under the normal distribution curve for both the left and right tail where the 99% interval did not cover while $\frac{\alpha }{2}$ is the area under the normal distribution curve for just one tail and we need the value for one tail in order to calculate the confidence interval