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Ber [7]
3 years ago
5

A researcher testing seed varieties for tulips got a confidence interval of (14.2%,17.4%) for the percent of seeds that can grow

16 inches tall. Find the sample proportion.
Mathematics
1 answer:
Alex73 [517]3 years ago
3 0

Answer:

The sample proportion is 0.158.

Step-by-step explanation:

In a confidence interval of proportions, we have the lower bound and the upper bound of the interval. The sample proportion is the halfway points between these bounds, that is, the sum of these bounds divided by 2.

In this problem, we have that:

Lower bound: 0.142

Upper bound: 0.174

Sample proportion: (0.142+0.174)/2 = 0.158

The sample proportion is 0.158.

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2. Sam has two part-time jobs, delivering pizza and mowing lawns. He makes $9/hr delivering pizza and $7/hr mowing lawns. Last w
frutty [35]

Answer:

<h2>22 hours and 10 hours </h2>

Step-by-step explanation:

let the jobs be x and y, so that

x+y=32--------1

9x+7y=248----2

x=32-y

substitute x=32-y for x in equation 2 we have

9(32-y)+7y=248

open bracket we have

288-9y+7y=248

-2y=248-288

-2y=-40

2y=40

divide both sides by 2 we have

y=40/2

y= 10 hours

subtitute y=10 for y in equation 1 to find x

x+10=32--------1

x=32-10

x=22

x=22 hours

4 0
3 years ago
Which equation represents Grant's path?<br> y = 2 - 4x<br> y = 4-<br> y = 8 - 2x
Norma-Jean [14]
Y = 8 - 2x



beepboopbopbep
7 0
3 years ago
Read 2 more answers
What equation represents a line which is parallel to the y-axis
sasho [114]

Answer:

y-axis is x = 0

Step-by-step explanation:

if P(x, y) is any point on AB, then x = a. Hence, the equation of a straight line parallel to the y-axis at a distance from it is x = a. The equation of the y-axis is x = 0, since, the y-axis is parallel to itself at a distance 0 from it.

4 0
3 years ago
Simplify the expression, write in expanded form and exponential form.
Xelga [282]

Answer:

225 x a^4

Step-by-step explanation:

4 0
3 years ago
The 12 members of the middle school filmmaking club need to raise at
lana [24]

Answer:

At least $62.50 per member

Step-by-step explanation:

They need to raise at least $1400-$650=$750 more.

That means on average $750/12 = $62.50 per member.

5 0
3 years ago
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