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marta [7]
3 years ago
7

Betty brought 8 cookies for lunch. She wanted to share the cookies with 3 friends. If she shared the cookies equally, how many c

ookies would Betty and each of her friends have?
Mathematics
1 answer:
Kamila [148]3 years ago
5 0

Step-by-step explanation:

Betty including her three friends equals to four people. Between Betty and her 3 friends, the 8 cookies are divided so each if them receive 2 cookies.

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Find the surface area of a cylinder with a base radius of 2 in and a height of 3 in.
Dennis_Churaev [7]

Answer:

62.8 in

Step-by-step explanation:

formula to find surface area of cylinder = 2πrh + 2πr²

2 × 3.14 × 2 × 3 + 2 × 3.14 × 2²

37.68 + 25.12

62.8 in

4 0
3 years ago
A red die is tossed and then a green die is tossed. What is the probability that red die shows a number larger than three and th
makkiz [27]
If you roll two fair dice, a green one and a red one?
A= are the outcomes on the dice independent?
B= Find P(1 on green die and 2 on red die)
C= Find P(2 on green die and 1 on red die)
D= Find P(1 on green die and 2 on red die) or (2 on green die and 1 on red die)

A= yes
B= p(1)*(p2)=1/6*1/6=1/36
C= p(2)*(p1)=1/36
D= 1/36=1/18 I hope it helps !
4 0
2 years ago
How does the sum of the interior angles change as you move the vertices of ABC to create a triangle of your choice
lbvjy [14]

Answer:

Depending on the type of triangle you form, the interior angles will either decrease or increase.

Step-by-step explanation:

if you move the vertices to form an equilateral triangle then the interior angles will change to 60°, 60°, 60° because all interior angles of an equilateral triangle are the same and the sum of the interior angles of any triangle always add of to 180°

3 0
2 years ago
A random sample of 121 automobiles traveling on an interstate showed an average speed of 65 mph. From past information, it is kn
loris [4]

Answer:

95 percent confidence interval for μ is determined by

(60.688 ,  69.312)

a) be the same

Step-by-step explanation:

<u>Step (i)</u>:-

Given data a random sample of 121 automobiles traveling on an interstate showed an average speed of 65 mph.

The sample size is n= 121

The mean of the sample x⁻ = 65mph.

The standard deviation of the population is 22 mph

σ = 22mph

<u>Step (ii) :</u>-

Given  The 95 percent confidence interval for μ is determined as

(61.08, 68.92)

we are to reduce the sample size to 100 (other factors remain unchanged) so

given The sample size is n= 100

The mean of the sample x⁻ = 65mph.

The standard deviation of the population is 22 mph

σ = 22mph

<u>Step (iii)</u>:-

95 percent confidence interval for μ is determined by

(x^{-} - 1.96\frac{S.D}{\sqrt{n} } , x^{-} + 1.96 \frac{S.D}{\sqrt{n} } )

(65 - 1.96\frac{22}{\sqrt{100} } , 65 + 1.96 \frac{22}{\sqrt{100} } )

(65 - 4.312 ,65 +4.312)

(60.688 ,  69.312) ≅(61 ,69)

This is similar to (61.08, 68.92) ≅(61 ,69)

<u>Conclusion</u>:-

it become same as (61.08, 68.92)

4 0
3 years ago
Which of the following vectors are orthogonal to (-1,3)? Check all that apply.
Aliun [14]
First vector orthogonal<span> to ⟨−</span>3<span>,4</span>
7 0
3 years ago
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