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3 years ago

Can someone describe this to me? I don't understand..

Mathematics

1 answer:

puteri [66]3 years ago

8 0

Answer:

5/6 is the answer saying 5 sides are not 6 only one is

Step-by-step explanation:

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A set of final examination grades in an introductory statistics course is normally distributed, with a mean of 77 and a standar

Shalnov [3]

Answer:

0.9007 is the probability that a student scored below 86 on this exam.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 77

Standard Deviation, σ = 7

We are given that the distribution of examination grades is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

a) P(student scored below 86)

P(x < 86)

$P( x < 86) = P( z < \displaystyle\frac{86 - 77}{7}) = P(z < 1.2857)$

Calculation the value from standard normal z table, we have,

$P(x < 1.2857) = 0.9007 = 90.07\%$

0.9007 is the probability that a student scored below 86 on this exam.

7 0

3 years ago

Bella works at a shoe store. In addition to a fixed salary, she earns a commission for each pair of shoes that she sells. The ta

xxTIMURxx [149]

D. It Is The Most Fitting Answer. The Other 3 Equal More Than Needed.

7 0

3 years ago

At time t, the position of a body moving along the s-axis is sequalsnegative t cubed plus 15 t squared minus 72 t m. a. Find t

larisa [96]

Answer:

Step-by-step explanation:

Given that at time t, the position of a body moving along the s-axis is sequalsnegative t cubed plus 15 t squared minus 72 t m

i.e. $s(t) = -t^3+15t^2-72 t$

Velocity is nothing but s'(t) = derivative of s

and acceleration is s"(t) = derivative of v(t)

$v(t) = -3t^2+30t-72\\=-3(t^2-10t+24)\\= -3(t-6)(t-4)$

a) v(t) =0 when t = 4 or 6

b) $a(t) = -6t+30$

a(t) =0 when t =5

c) Distance travelled by the body from 0 to 5 would be

$s(5)-s(0)\\= -5^3+15(5^2)-72(5)\\= -125+375-360\\=-110$

i.e. 110 miles (distance cannot be negative)

3 0

2 years ago

Find the Value of x from the following :

Sonja [21]

$▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪$

<h3>Question 1 ~</h3>

$log_{x}(64) = 2$

${x}^{2} = 64$

$x = \sqrt{64}$

$x = \sqrt{8 \times 8}$

$x = 8$

<h3>Question 2 ~</h3>

$log_{2}(x) = 5$

$x = 2 {}^{5}$

$x = 32$

I hope it helped ~

7 0

3 years ago

You have a Bread recipe:- 500 g flour 2 teaspoons salt 7 g dry yeast 4 tablespoons olive oil 300 ml water If you’re scaling down

makvit [3.9K]

Answer:

228 grams

Step-by-step explanation:

500/2=250

7*4=28

300-250=50

250-50-+28=228

6 0

3 years ago