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Jobisdone [24]
3 years ago
6

A team won 40 of its first 50 games. How many of the remaining 40 games must this team win so it will have won exactly 70% of it

s games for the season?
Mathematics
1 answer:
tensa zangetsu [6.8K]3 years ago
6 0

Answer:30

Step-by-step explanation:

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True or False: If your expression contains more than one set of parentheses, you should evaluate all of them before doing anythi
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False

Step-by-step explanation:

Parentheses should be evaluated first according to PEMDAS in every situation.

Parentheses

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3 years ago
-2 is greater than or equal to 5-x over three and greater than two
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Answer:

11 =< x < -1

Step-by-step explanation:

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4 0
3 years ago
1. Assume that men’s weights are normally distributed with a mean given by  = 172lb and a standard deviation given by  =29lb.
AURORKA [14]

Answer:

1) 0.99348

2) 0.55668

Step-by-step explanation:

Assume that men’s weights are normally distributed with a mean given by  = 172lb and a standard deviation given by  =29lb. Using the Central Limit Theorem to solve the following exercises

When given a random number of samples, we use the z score formula:

z-score is z = (x-μ)/σ/√n where

x is the raw score

μ is the population mean

σ is the population standard deviation.

(1) If 36 men are randomly selected, find the probability that they have a mean weight greater than 160lb.

For x > 160 lb

z = 160 - 172/29/√36

z = 160 - 172/29/6

z = -2.48276

Probability value from Z-Table:

P(x<160) = 0.0065185

P(x>160) = 1 - P(x<160) = 0.99348

(2) If 81 men randomly selected, find the probability that they have a mean weight between 170lb and 175lb.

For x = 170 lb

z = 170 - 172/29/√81

z = 170 - 172/29/9

z = -0.62069

Probability value from Z-Table:

P(x = 170) = 0.2674

For x = 175 lb

z = 175 - 172/29/√36

z = 175- 172/29/6

z = 0.93103

Probability value from Z-Table:

P(x = 175) = 0.82408

The probability that they have a mean weight between 170lb and 175lb is calculated as:

P(x = 175) - P(x = 170)

0.82408 - 0.2674

= 0.55668

6 0
2 years ago
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