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S_A_V [24]
1 year ago
15

During her pre-college years, Elise won 30% of the swim races she entered. During college, Elise won 20% of the swim races she e

ntered. We can conclude that, in high school and college combined, Elise won
Mathematics
1 answer:
svetoff [14.1K]1 year ago
8 0
During her pre-college years, Elise won 30% of the swim races she entered. During college, Elise won 20% of the swim races she entered. We can conclude that, in high school and college combined, Elise won <span>more than 20% but less than 30% of the races she entered</span>
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Paul bought 9 total shirts for a total of $72. Tee shirts cost $10 and long sleeves shirts cost
luda_lava [24]
This is the whole problem : Paul bought 9 total shirts for a total of $72. Tee shirts cost $10 and long sleeve shirts cost $7. How many of each type of shirt did he buy?
7 0
1 year ago
John took all his money from his savings account. He spent ​$110 on a radio and 4/11 of what was left on presents for his friend
svp [43]

Answer:

$1210

Step-by-step explanation:

Let x be total amount

First John spent $110 on a radio and 4/11 of what was left on presents for his friends so he was left with

\frac{7}{11}(x-110)=\frac{7}{11}x-70

Then he put 2/5 of his remaining money into a checking account

\frac{3}{5}\left(\frac{7}{11}x-70\right)

Rest he donated to charity

420=\frac{3}{5}\left(\frac{7}{11}x-70\right)\\\Rightarrow \left(\frac{7}{11}x-70\right)=\frac{2100}{3}\\\Rightarrow \frac{7}{11}x-70=700\\\Rightarrow \frac{7}{11}x=770\\\Rightarrow x=1210

Hence total amount of money John originally had was $1210

8 0
1 year ago
a bookshelf is 14 inches wide.there is enough space to fit 2 trophies one trophy is 2 inches wider than the other. how wide is t
Orlov [11]
The answer is 9 because half of 14 is 7, and 7+2=9
5 0
1 year ago
Read 2 more answers
One of your employees has suggested that your company develop a new product. You decide to take a random sample of your customer
iren [92.7K]

Answer:

269

Step-by-step explanation:

The margin of Error is E = 0.05

The level of significance is, α = 1 - confidence level = 1 - 0.9 = 0.1

Assume that the proportion is, p =0.5

From the standard normal table, observe that the critical value of Z for two tail test and 10% level of significance is 1.64

The calculation of sample size is as follows: n = (Z/E)²p(1-p)

n = (1.64/0.05)²0.5 (1 - 0.5)

n = (1.64/0.05)² 0.25

n = 1075.84 × 0.25

n = 268.96 ≈ 269

The required sample size with the given margin of error approximately is 269. This value indicates the size of the customers who are using this company’s products.

6 0
1 year ago
In the diagram below, BC is an altitude of ABD. To the nearest whole unit, what is the length of CD?
dem82 [27]
First we need to calculate the 2 angles that make up Angle B at the top of the triangle.
 Using that angle we can find the length of CD.


 See the attached picture:

7 0
2 years ago
Read 2 more answers
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