1. In a gym class, students have to run a mile. For a 6th grade class, the average was 512 seconds with a standard deviation of 68.
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a) What is the probability of a student running less than 400 seconds?
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b) What is the probability of a student running more than 610 seconds?
c) What is the probability of a student running between 475 and 525 seconds?
2. If Biology test scores were normally distributed with a mean a 78 and a standard deviation

ad = ae + ed = y + 7

similar triangles therefor

ac/ab = ad/ae

6/4 = (y + 7) / y

cross multiply

6y = 4(y + 7)

6y = 4y + 28

2y = 28

y = 14

step-by-step explanation:

answer

false

explanation

these practices describe the manner the land use outcome is attained. land management methods implemented by corporations are a mandatory because they are a driver for better land use results economically, socially and environmentally. corporations are required to understand the connection between land use , and land management practices to support sustainable land use policies

answer: b.36 feet

step-by-step explanation:

$3720

step-by-step explanation:

taxable income = $31000

as per the 2018-2019 us tax bracket, the tax rate is 12% for an individual whose taxable income is between $9,526 to $38,700.

so, the tax to be paid by him = 12% of 31000

= 0.12 * 31000     [12% converted to decimal as 0.12]

= $3720