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3 years ago

PLEASEEEE HELPPPP!!!!:(((((:(:(

Mathematics

1 answer:

Paladinen [302]3 years ago

4 0

Answer: x=3, p/2,-p/2

Step-by-step explanation:

it's hard to explain, so let me know if you really want me to explain.

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Denise guessed that the elephant at the zoo weighed 10,000 pounds. It actually weighed 12,400 pounds. Yesia guessed that the hip

NeX [460]

Answer: weight of elephant has smaller percent error.

Step-by-step explanation:

Percent error = $\dfrac{|\text{estimated value -actual value}|}{\text{actual value}}]\times100$

Estimated weight of elephant = 10,000 pounds

Actual weight of elephant = 12,400 pounds

Percent error of weight = $\dfrac{|12400-10000|}{12400}\times100\%\approx19.35\%$

Estimated weight of hippopotamus = 2,500 pounds

Actual weight of hippopotamus = 3,600 pounds

Percent error of weight = $\dfrac{|2500-3600|}{3600}\times100\%\approx30.55\%$

Since 19.35 < 30.55

hence, weight of elephant has smaller percent error.

3 0

3 years ago

In the past, the average age of employees of a large corporation has been 40 years. Recently, the company has been hiring older

earnstyle [38]

Answer:

Step-by-step explanation:

In the past, mean of age of employees

i.e. $\mu = 40$

Recently sample was taken

n = sample size = 60

Mean of sample = 45

Std dev of sample s = 16

$H_0: \bar x = 40\\H_a: \bar x >40$

(Right tailed test)

Since only population std deviation is known we can use t test only

Std error = $\frac{s}{\sqrt{n} } \\=\frac{16}{\sqrt{61} } \\=2.049$

Mean difference = 45-40 =5

Test statistic t= $\frac{5}{2.049} \\=2.441$

df = 60

p value =0.008739

Since p < 0.05 we reject null hypothesis

The mean age has increased.

5 0

3 years ago

Evaluate. Let n = 2.Enter the answer in lowest terms.

jok3333 [9.3K]

First you do the top
8n+3n-7=8*2+3*2-7=16+6-7= 22-7=15
Then you found out the bottom
6*2n-3(n-1)=6*2*2-3(2-1)=6*2*2-3*1=6*4-3*1=24-3*1=24-3=21
15/21 is your answer.
Hope this helps! :)

5 0

4 years ago

Read 2 more answers

a football team gained 9 yards on one play and then lost 22 yards on the next.write a sum of intergers to find the overall chang

s2008m [1.1K]

Let x be the original position.

After the first play they gain 9 yards. The position can be represented by
x + 9

After the second play they lose 22 yards. The position can be represented by
x + 9 - 22 = x - 13

Therefore, in total they lost 13 yards.

5 0

3 years ago

What is the circumference of a circle that has a area of 452.16

Volgvan

$C = 2\sqrt{ \pi A}

C = 2\sqrt{ \pi 452.16}$
$C = 75.38$

8 0

4 years ago