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Bezzdna [24]
3 years ago
15

Write an equation for an exponential growth function where the initial population is 80 and the population quadruples during eac

h time period.
Mathematics
1 answer:
liq [111]3 years ago
6 0
f(t) = 80(4^t)

For each time period, each time "t" increases by one, the population will be multiplied by 4.
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A random sample of 28 items is drawn from a population whose standard deviation is unknown. The sample mean is x=900 and the sam
tatiyna

Answer:

<em>795.596≤u≤804.403</em>

Step-by-step explanation:

Confidence interval is expressed using the formula;

CI = xbar ± (z*s/√n)

xbar is the sample mean

z is the z score at 98% confidence

s is the standard deviation

n is the sample size

Given

xbar = 800

z = 2.33

s = 10

n = 28

Substitute into the formula;

CI =800 ± (2.33*10/√28)

CI = 800 ± (2.33*10/5.2915)

Ci = 800± (2.33* 1.8898)

CI = 800 ± 4.4033

CI = (800-4.4033, 800 + 4.4033)

CI = (795.596, 804.403)

<em>Hence an interval estimate of u with 98% confidence is expressed as </em>

<em>795.596≤u≤804.403</em>

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Step-by-step explanation:

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Round each number to the nearest ten and estimate the sum.<br>82.14 + 38.5 + 41.3​
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