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2 years ago

6

-2.7+17.8+29.5+8.9=?

2 answers:

BARSIC [14]2 years ago

6 0

Answer:

64.5

Step-by-step explanation:

64.5

Korolek [52]2 years ago

6 0

Step-by-step explanation:

the answer to this problem is 53.5.

-2.7+17.8+29.5+8.9=

-2.7+56.2

53.5

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Data were collected from a typing class with 45 students. The class had an average of 56 words per minute (WPM) with a standard

STALIN [3.7K]

Answer:

Standard deviation gets smaller

Step-by-step explanation:

No. of students = 45

The class had an average of 56 words per minute (WPM) with a standard deviation of 7 WPM.

$Mean = \frac{\text{Sum of all observations}}{\text{No. of observations}}\\56=\frac{Sum}{45}\\56 \times 45=Sum\\2520=Sum$

The teacher realized that the data from one student who typed 55 WPM was not entered.

So, new sum = 2520+55

New sum =2575

So, new mean = $\frac{2575}{45}$

New mean =57.22

Standard deviation is the measure of distance between observation and mean

So, if number gets closer to mean , Standard deviation gets smaller . if the numbers get bigger , Standard deviation gets bigger.

Since 55 is closer to 57.22

So, Standard deviation gets smaller

4 0

2 years ago

The cost of renting a car is a flat 26 plus an additiona 0.13 cents per mile that you drive how face can you drive for 99

asambeis [7]

99 miles?

y = 0.13x + 26
y = 0.13(99) + 26
y = 12.87 + 26
y = 38.87

5 0

3 years ago

Suppose we are interested in bidding on a piece of land and we know one other bidder is interested. The seller announced that th

ira [324]

a. Suppose you bid $11,500. What is the probability that your bid will be accepted?

b. Suppose you bid $13,500. What is the probability that your bid will be accepted?

Answer:

a. 0.392

b. 0.784

Step-by-step explanation:

Given

a = 9,500 , b = 14,600

The probability density function is given by 1 divided by the interval between a and b.

f(x) = 1/(b - a)

f(x) = 1/(14,600 - 9,500)

f(x) = 1/5100

f(x) = 0.000196

a. Suppose you bid $11,500. What is the probability that your bid will be accepted?

This is given by the integration of f(x) over the interval in the probability

I.e.

P(x < 11,500) = Integral of 0.000196dx, where upper bound = 11,500 and lower bound = 9,500

Integrating 0.000196dx gives

0.000196x introducing the upper and lower bound.

We get

0.000196(11,500 - 9,500)

= 0.392

b. Suppose you bid $13,500. What is the probability that your bid will be accepted?

This is given by the integration of f(x) over the interval in the probability

I.e.

P(x < 13,500) = Integral of 0.000196dx, where upper bound = 13,500 and lower bound = 9,500

Integrating 0.000196dx gives

0.000196x introducing the upper and lower bound.

We get

0.000196(13,500 - 9,500)

= 0.784

8 0

3 years ago

A cup of coffee contains 100 mg of caffeine, which leaves the body at a continuous rate of 17% per hour.Part A) Write a formula

forsale [732]

SOLUTION:

Step 1:

In this question, we are given the following:

A cup of coffee contains 100 mg of caffeine, which leaves the body at a continuous rate of 17% per hour.

Part A) Write a formula for the amount, A mg, of caffeine in the body t hours after drinking a cup of coffee.

Step 2:

The details of the solution are as follows:

The graph of:

$A_o=100e^{-0.17t}$

is as follows:

8 0

1 year ago

How to get the answer to this question

nalin [4]

Yeah where is the questions?

7 0

3 years ago