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Strike441 [17]
2 years ago
11

Please solve and show your work

Mathematics
2 answers:
malfutka [58]2 years ago
7 0
I r d k sorry ghhfdhjh hhhhj
yaroslaw [1]2 years ago
5 0

Answer:

791.28

Step-by-step explanation:

1. 3.14*9²=254.34

2. 3.14*9*19=536.94

3. 536.94+254.34=791.28

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Which expressions are equivalent to 22c + 33d?
harkovskaia [24]

Answer:

A, C, and E

Step-by-step explanation:

For the first one, distribute -11 to each value. A negative times a negative is a positive, so -11×-2c is 22c. -11×-3d is 33d. So the first one is right. For the third one, distribute 1/3 to each value. 1/3 of 66c is 22c, and 1/3 of 99d is 33d, so the third one is correct as well. For the last one, distribute 11 again. 11×2c is 22c and 11×3d is 33d, so the last one is correct.

4 0
2 years ago
Help plz with 17,18,19
Brilliant_brown [7]
17 is C, 18 is J,and 19 is B.We just and a math test in this and I got an A+
3 0
3 years ago
Read 2 more answers
What is the constant rate of change for the relationship shown in the table?
Yakvenalex [24]

Answer:

3

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
A study of 420 comma 000 cell phone users found that 134 of them developed cancer of the brain or nervous system. Prior to this
Vesnalui [34]

Answer: (0.00306,0.00334)

Step-by-step explanation:

Given : Sample size : n= 420000

The number of users developed cancer of the brain or nervous system =134

Then , the proportion of users developed cancer of the brain or nervous system :

p=\dfrac{134}{420000}\approx0.0032

Significance level : 1-0.90=0.1

Critical value : z_{\alpha/2}=1.645

The confidence interval for population proportion is given by :-

p\ \pm\ z_{\alpha/2}\sqrt{\dfrac{p(1-p)}{n}}\\\\=0.0032\pm (1.645)\sqrt{\dfrac{(0.0032)(1-0.0032)}{420000}}\approx0.0032\pm0.00014\\\\=(0.00306,0.00334)

Hence, the 90​% confidence interval estimate of the percentage of cell phone users who develop cancer of the brain or nervous system is (0.00306,0.00334).

4 0
3 years ago
I need to know how to solve problem one. I tried it several different ways but I just can't seem to crack it. Can someone solve
grandymaker [24]
Either 100 ft or 50 ft
4 0
3 years ago
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