CAN SOMEONE PLEASE HELP ASAP!!

Mathematics

1 answer:

Natalka [10]2 years ago

4 0

Answer:

42.9

Step-by-step explanation:

There are many ways to answer this one, the most direct way would be to state that tan(65)=a/20

20tan(65)=a

Using the calculator (set in degree mode)

we find that a ~ 42.9

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Name the property used in: (5 + 2) + n = 7 + n

rjkz [21]

Additive indentity
$(5 + 2) + n$
n = 1
a variable is always a number itself remember 7+n
5+2 = 7

5 0

3 years ago

10# A consumer advocacy group is doing a large study on car rental practices. Among other things, the consumer group would like

ella [17]

ANSWER:

104

STEP-BY-STEP EXPLANATION:

Given:

Standard deviation (σ) = 700

Confidence level = 95%

Mean error (Eμ) = 135

We have for a confidence level of 95%:

$\begin{gathered} \alpha=100\%-95\%=5\%=0.05 \\ \\ \alpha\text{/2}=\frac{0.05}{2}=0.025 \\ \\ \text{ The corresponding Z value for \alpha/2 = 0.025 is as follows:} \\ \\ Z_{\alpha\text{/2}}=1.96 \end{gathered}$

Now, we calculate the minimum value of the sample size as follows:

$\begin{gathered} n=\left(\frac{Z_{\alpha\text{/2}}\cdot\sigma}{E}\right)^2 \\ \\ \text{ We replacing:} \\ \\ \:n=\left(\frac{1.96\cdot 700}{135}\right)^2 \\ \\ \:n=103.2858\cong104 \end{gathered}$

The minimum sample size needed is 104

3 0

1 year ago

Someone help me with this ASAP!!!

Dafna1 [17]

Answer:

33.09

Step-by-step explanation:

You just subtract 26.91 from 60

4 0

2 years ago

Read 2 more answers