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olga55 [171]
3 years ago
15

Conrad bought 21 stamps from a hobby shop. He gave 3/7 of them to his brother. He put

Mathematics
1 answer:
Phantasy [73]3 years ago
5 0
He put 12 stamps in his collection.
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A store sells 12-packs of ballpoint pens for $1.09 each and composition books for $2.79 each. Cindy buys m packs of ballpoint pe
pogonyaev
A 5% discount indicates that her total purchase amount will be decreased by 5%. Paying full price could be shown as 1.00, so we must subtract 0.05 from the full price to represent the discounted total (1.00-0.05 = 0.95).
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3 0
3 years ago
The cost of a daily newspaper varies from city to city. however, the variation among prices remains steady with a standard devia
Tanya [424]

First, we establish our hypothesis:

<span>Null hypothesis H0: μ = $1.00  </span>

Alternative hypothesis Ha: μ ≠ $1.00

<span>Let’s say X  = the sample average cost of a daily newspaper = 0.96</span>

u = population mean cost = 1.00

S = sample standard deviation = 0.18

Calculating for z value:

z = (X – u) / S

z = (0.96 – 1) / 0.18

z = – 0.222

From the standard distribution table at this z value, p-value = 0.4129

Since alpha = 0.01, the decision therefore is:

<span>Do not reject the null hypothesis because the p-value is greater than 0.01. There is enough evidence to support the claim that the mean cost of newspapers is $1. </span>

6 0
3 years ago
Answer:<br><br> 2<br><br> Step-by-step explanation:<br><br> 2+2=2
vitfil [10]

Answer:

thank you for free point and have a nice day and

6 0
3 years ago
Read 2 more answers
You deposit $500 in an account that earns 4% simple annual interest entrance and each year is added to the principal to create a
ikadub [295]

Answer:

first year $20 second year $20.80 Third year $21.63

Step-by-step explanation: This is for an extra money per year so after the first year that is how much extra money he gets every year.

4 0
2 years ago
What is the surface area if this sphere?
Darya [45]
I think the answer is 126.6466666666667but rounded be 126.65
8 0
3 years ago
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