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hram777 [196]
3 years ago
9

a battery company manufactures batteries having life spans that are normally distributed, with a mean of 45 months and a standar

d deviations of 5 months. find the probability that a battery chosen at random will have each life span. a. 48-50 months b. 45-52 months
Mathematics
2 answers:
RSB [31]3 years ago
6 0
A is the correct answer
stepladder [879]3 years ago
4 0
I'd say (A) is the correct answer
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(7) m∠A = 52°

(8) m∠B = 117°

Solution:

(7) Let us first define the supplementary and complementary angles.

Supplementary angles: Two angles are said to be supplementary angles if their sum is add up to 180°

Complementary angles: Two angles are said to be complementary angles if their sum is add up to 90°

Given supplement of 142° = 180° – 142°

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Complement of ∠A = Supplement of 142°

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(8) Given complement of 27° = 90° – 27°

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Supplement of ∠B = Complement of 27°

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