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Cerrena [4.2K]
2 years ago
9

There is a puddle 1.4 cm deep in your backyard. After one minute of rain, the puddle was 1.45 cm deep. The puddle was 1.5 cm dee

p after it rained for two minutes. If the pattern continues, how deep will the puddle be after it rains for 45 min?
Mathematics
1 answer:
Readme [11.4K]2 years ago
3 0

Answer:

I know answer. give me money I will tell everything..

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Let f(x)=7x^2-8. find f(a^2)
strojnjashka [21]

Answer:

\large\boxed{f(a^2)=7a^4-8}

Step-by-step explanation:

f(x)=7x^2-8\\\\f(a^2)\to \text{put}\ x=a^2\ \text{to the equation of the function}\ f:\\\\f(a^2)=7(a^2)^2-8\qquad\text{use}\ (a^n)^m=a^{nm}\\\\f(a^2)=7a^{2\cdot2}-8\\\\f(a^2)=7a^4-8

6 0
3 years ago
Five students visiting the student health center for a free dental examination during National Dental Hygiene Month were asked h
kirza4 [7]

Answer:

95% confidence interval for the mean number of months is between a lower limit of 6.67 months and an upper limit of 25.73 months.

Step-by-step explanation:

Confidence interval is given as mean +/- margin of error (E)

Data: 5, 15, 12, 22, 27

mean = (5+15+12+22+27)/5 = 81/5 = 16.2 months

sd = sqrt[((5-16.2)^2 + (15-16.2)^2 + (12-16.2)^2 + (22-16.2)^2 + (27-16.2)^2) ÷ 5] = sqrt(58.96) = 7.68 months

n = 5

degree of freedom = n-1 = 5-1 = 4

confidence level (C) = 95% = 0.95

significance level = 1 - C = 1 - 0.95 = 0.05 = 5%

critical value (t) corresponding to 4 degrees of freedom and 5% significance level is 2.776

E = t×sd/√n = 2.776×7.68/√5 = 9.53 months

Lower limit of mean = mean - E = 16.2 - 9.53 = 6.67 months

Upper limit of mean = mean + E = 16.2 + 9.53 = 25.73 months

95% confidence interval is (6.67, 25.73)

3 0
2 years ago
determine whether the equation represents a direct varation. if it does, find the constant, find the constant variation. 2y = 5x
SVETLANKA909090 [29]
Is it 5x1?
or 5x+1   cause i'm confused 
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3 years ago
Rodrigo traveled at an average speed of 55 miles per hour for 5 hours to get from one national park to the next on his vacation.
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275 miles to the next park
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3 years ago
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What is 8 2/3 dividend by 3 1/3
Anni [7]
It is 2 and 3/5 your welcome :)
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3 years ago
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