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iragen [17]
3 years ago
11

5. If your friend's doctor wants her target heart rate range to be between 143 and 170, and her

Mathematics
1 answer:
nikdorinn [45]3 years ago
4 0

Answer:

a person can work out 50% of the maximum (50% of 194 is 97) and 85% of the maximum (85% of 194 is 164.9). This means that the target heart rate for a 20-year-old is approximately 97–165 bpm. so around 21.

Step-by-step explanation:

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Answer:

7

Step-by-step explanation:

σ = 4 ; μ =?

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P(X < 8.52) = 64.8%

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Using the Z relation :

(x - μ) / σ

P(Z < (8.52 - μ) / 4)) = 0.648

The Z value of 0.648 of the lower tail is equal to 0.38 (Z probability calculator)

Z = 8.52 - μ / 4

0.38 = 8.52 - μ / 4

0.38 * 4 = 8.52 - μ

1.52 = 8.52 - μ

μ = 8.52 - 1.52

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5 0
3 years ago
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BaLLatris [955]

Answer:

roots: 1 and 3

k = 3

Step-by-step explanation:

2 roots: p and p+2

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-2 (p+1) = -4

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p' = 1+2 = 3   ... root 2

k = p² + 2p = 3

check: (x-1) (x-3) = x² - 4x + 3 = x² - 4x + k

6 0
3 years ago
a club decides to sell t-shirts for $15 as a fundraiser. It costs $20 plus $9 per t-shirt to make the t-shirts. write and solve
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3 years ago
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irina [24]

Answer:

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Step-by-step explanation:

Move the -8x over to the right side by adding it, You are now at

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Move these around and you are now at

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5 0
2 years ago
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Maurinko [17]

Answer:

18/5 or 3 3/5

Step-by-step explanation:

Depends if you want it simplified

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3 years ago
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