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Paraphin [41]
3 years ago
7

Jack works at a party supply store. He sold 720 balloons in the last 16 days. What was his selling rate in balloons per day?

Mathematics
1 answer:
Colt1911 [192]3 years ago
5 0

Answer:

he was selling balloons 45 / day

Step-by-step explanation:

sold 720 ballons in 16 days.

  • What was selling rate in balloons per day?

-----------------------------------------

  • number of balloons ÷ number of days
  • 720 ÷ 16
  • 45 balloons/day
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500

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The Jacobian has determinant

\det\mathbf J=\begin{vmatrix}2u+v&u\\v^2&2uv\end{vmatrix}=(2u+v)2uv-uv^2=4u^2v+uv^2=uv(4u+v)
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3 years ago
Read 2 more answers
A researcher wished to compare the effect of two stepping heights (low and high) on heart rate in a step-aerobics workout. A col
Alinara [238K]

Answer:

The answer is "between 0.10 and 0.05".

Step-by-step explanation:

For sample 1:

n_1 = 25\\\\\bar{x_1} = 90.00\\\\ s_1 = 9\\\\

For sample 2:

n_2 = 25\\\\ \bar{x_2} = 95.08\\\\ S_2 = 12\\\\

Calculating the null and alternative hypotheses:

H_O : \mu_1 = \mu_2 \\\\ H_Q : \mu_1  

Calculating the test statistic:

Z= \frac{90-95.08}{ \sqrt{\frac{9^2}{25}+\frac{12^2}{25}}} \\\\ =\frac{-5.08}{ \sqrt{\frac{81}{25}+\frac{144}{25}}}\\\\=\frac{-5.08}{ \sqrt{\frac{81+144}{25}}}\\\\=\frac{-5.08}{ \sqrt{\frac{225}{25}}}\\\\=\frac{-5.08}{ \frac{15}{5}}\\\\=\frac{-5.08}{3}\\\\= -1.693

Calculating the conservative degrees of freedom:

DF = min (n_1 -1, n_2 - 1) = min(25-1, 25-1) = 24

by using Excel the p-value for left tailed test and for test statistic will be -1.693 with DF = 24.

\to p-value = TDIST(1.693, 24, 1) = 0.0517\ \ \ \  i.e, \bold{0.05 < p-value < 0.10}

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3 years ago
Write an explicit formula for this table<br><br> Days 1 2 3 4 5<br> Views 17 33 49 65 81
Oksanka [162]

Answer:

Step-by-step explanation:

and it's an arithmetic sequence.

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