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3 years ago

In a? symmetric, unimodal? distribution, about? two-thirds of the observations are? where?

1 answer:

4 0

In a symmetric distribution, better known as the Gaussian or normal distribution, two thirds of the observations or 66.67% of the observation belongs to the area between the -3∅ to +3∅ where ∅ is the standard deviation of the group. it is assumed here that the mean is 1 and the area under the curve is also 1.

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Find the difference between the terms a10 of an arithmetic sequence and a geometric sequence, both of which

Nady [450]

Answer:-288

Step-by-step explanation:

Given

First term $a_0$ is common for both AP and GP

For AP

$a_2=4=a_0+2d$ ---1

$a_4=12=a_0+4d$ ----2

From 1 & 2 we get

d=4

$a_0=-4$

$a_{10}$ for AP

$a_{10}=a_0+10d=-4+10\times 4=36$

For GP

$4=a_0r^2$ ----3

$12=a_0r^4$ ----4

From 3 & 4 we get

$3=r^2$

$r=\sqrt{3}$

$a_0=\frac{4}{3}$

For $a_{10}=\frac{4}{3}\times 3^5=324$

$AP_{a_{10}}-GP_{a_{10}}=36-324=-288$

3 0

3 years ago

Sully and genesis purchase 2 matinee tickets. A matinee ticket cost $6.50, a drink cost $5.50 and a bag of popcorn cost $6.00. D

rosijanka [135]

Let us represent the number of tickets bought with t, the number of drinks bought with d, and the number of bags of popcorn bought with b. The expression for total cost becomes,

6.5t + 5.5d + 6b

We know that two tickets were bought, so we may plug in 2 for t and get the final expression:
6.5(2) + 5.5d + 6b

13 + 5.5d + 6b

6 0

4 years ago

Piere is an electrician

VLD [36.1K]

Answer:

c=$125

Step-by-step explanation:

9:30--12:30 is three hours, then another half hour till 1pm total hours is 3.5

c = 20+30*3.5

c=20 + 105

c = 125

3 0

3 years ago

Factor. 2x2 + 4x + 18

Rudiy27

You can't.

It’s already been factored down.

6 0

3 years ago

Another virus starts spreading on July 1st, 2020. No one

sdas [7]

Answer:

1000÷11=90.9

So,29th September

3 0

3 years ago