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3 years ago

CAN SOMEONE PLEASE ANSWER!

Mathematics

1 answer:

zlopas [31]3 years ago

8 0

Answer:

AD = 1.96

BD = 6.72

CD = 23.04

Step-by-step explanation:

7/25 = AD/7

25AD = 49

AD = 1.96

24/25 = BD/7

25BD = 168

BD = 6.72

CD = 25 - 1.96 = 23.04

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Answer:

Joseph caught 7 tadpoles

Step-by-step explanation:

Let the number of tadpoles caught by Joseph be x

The number of tadpoles Wendy caught will be ;

9(x + 3)

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Hence, mathematically;

9(x + 3)/2 - 6x = 3

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Step-by-step explanation:

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Evaluate the expression b2- 15 if b=9

Rudiy27

Answer:

Step-by-step explanation:

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Fission tracks are trails found in uranium-bearing minerals, left by fragments released during fission events. An article report

Harlamova29_29 [7]

Answer:

Mean track length for this rock specimen is between 10.463 and 13.537

Step-by-step explanation:

99% confidence interval for the mean track length for rock specimen can be calculated using the formula:

M± $\frac{t*s}{\sqrt{N}}$ where

M is the average track length (12 μm) in the report
t is the two tailed t-score in 99% confidence interval (2.977)
s is the standard deviation of track lengths in the report (2 μm)
N is the total number of tracks (15)

putting these numbers in the formula, we get confidence interval in 99% confidence as:

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Therefore, mean track length for this rock specimen is between 10.463 and 13.537

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3 years ago