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Bingel [31]
3 years ago
5

The recommended heart rate for weight management exercise and improving cardio fitness, in beats per minute, depend on a persons

age and can be represented by the expression 0.7(220-a)
Mathematics
1 answer:
Korolek [52]3 years ago
4 0

The answer to this question is true. If i'am right this from k12 and edg-enuity. have a good day bro. ;)

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1. In the spring of 2017, the Consumer Reports National Research Center conducted a survey of 1007 adults to learn about their m
avanturin [10]

Answer:

The correct answer is "1668". A further solution is provided below.

Step-by-step explanation:

According to the question,

Estimated proportion,

\hat{p} = \frac{574}{1007}

  =0.57

Margin of error,

E = 0.02

Level of confidence,

= 90%

= 0.90

Critical value,

Z_{0.10}=1.65

Now,

⇒  0.02=1.65\times \sqrt{\frac{0.57\times 0.43}{n} }

 0.0004=2.7225\times \frac{0.2451}{n}

         n=\frac{2.7225\times 0.2451}{0.0004}

             =1668.21

or,

         n \simeq 1668

5 0
3 years ago
Look at the box-and-whisker plot.
Marizza181 [45]

i would say B

when it says "the measure", it's refering to where the second quartile is beginning

3 0
3 years ago
Consider this sequence: -81, -54, -36, -24, … .
N76 [4]
If it is geometric then
if the terms are a,b,c,d then
b/a=c/b=d/c
so
-54/-81=-36/-54=-24/-36?
2/3=2/3=2/3

and that is the common ratio

it is geomertic and common ratio is 2/3
7 0
3 years ago
Помогите решить, пожалуйста, с 1-8. Дам 50 баллов.​
kifflom [539]

Answer:

Step-by-step explanation:

Download pdf
5 0
2 years ago
What is the answer in substiution y=2x-9 and y=3
ale4655 [162]

Answer:

x= -6

Step-by-step explanation:

7 0
1 year ago
Read 2 more answers
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