All categories

3 years ago

Please help me !!!!!!

Mathematics

1 answer:

alexgriva [62]3 years ago

8 0

Answer:

d a e

Step-by-step explanation:

idk how to explain just look at the graph?

You might be interested in

Standardized tests: In a particular year, the mean score on the ACT test was and the standard deviation was . The mean score on

Scorpion4ik [409]

Complete question :

Standardized tests: In a particular year, the mean score on the ACT test was 19.3 and the standard deviation was 5.3. The mean score on the SAT mathematics test was 532 and the standard deviation was 128. The distributions of both scores were approximately bell-shaped. Round the answers to at least two decimal places. Part: 0/4 Part 1 of 4 (a) Find the z-score for an ACT score of 26. The Z-score for an ACT score of 26 is

Answer:

1.26

Step-by-step explanation:

Given that:

For ACT:

Mean score, m = 19.3

Standard deviation, s = 5.3

Zscore for ACT score of 26;

Using the Zscore formula :

(x - mean) / standard deviation

x = 26

Zscore :

(26 - 19.3) / 5.3

= 6.7 / 5.3

= 1.2641509

= 1.26

6 0

3 years ago

A rounded number for the speed of an insect Is 5.67 meters per second.What are the fastest and slowest speeds to the thousandths

zepelin [54]

Slowest- 5.665 because it is 5 so it will round up.
Fastest- 5.669 will also round up to the nearest hundredth which is 5.67

3 0

4 years ago

In one statistics course, students reported studying an average (mean) of 9.92 hours a week, with a standard deviation of 4.54.

quester [9]

Answer:

For the student who is studying 10 hours a week is in the 57.93th percentile.

Step-by-step explanation:

Corresponding z-score for the student who studies 10 hours a week can be calculated by the formula

z= $\frac{x-M}{s}$ where

x is the hours student work in a week, which is 10,
M is the mean studying hour of the class, which is 9.92,
s is the standart deviation which is 4.54

from here we find that z= $\frac{10-9.92}{4.54}$ ≈0.2

Corresponding percentile for z=0.2 is 57.93

6 0

3 years ago

If \dfrac{a}{b}=2 b a =2start fraction, a, divided by, b, end fraction, equals, 2, what is the value of \dfrac{4b}{a} a

kakasveta [241]

So, we have two equations. The first one is a/b = 2, and the other one is to find the value of 4b/a. In order to solve this, let's find the value of b/a. As you can observe, b/a is the reciprocal of a/b. Therefore, b/a is also the reciprocal of 2. This means that b/a = 1/2. Now, substituting this to the second equation, the answer would be

4b/a = 4(1/2) = 2

The answer is 2.

3 0

3 years ago

Please help with the questions in the image

iren2701 [21]

Step-by-step explanation:

This seems to be calculus 1.

Question a

We have $-2x^3 + 5x^2 + 9$

m = slope = derivative

Find the derivative / slope of $-2x^3 + 5x^2 + 9$

We do this by differentiating the polynomials. There are a few methods to do this but I am going to use the power rule, which we multiply the constant by the exponent on the variable and subtract one from the exponent.

$\frac{d}{dx}(-2x^3 + 5x^2 + 9)$