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3 years ago

What number is 40% of 90

Mathematics

1 answer:

mr_godi [17]3 years ago

3 0

Answer:

Step-by-step explanation:

Set up as proportion 40/100 = x/90

Cross multiply 3600 = 100x

DIvide by 100

x = 36

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11/15 - 1/4 = ????<br> no links please!

valkas [14]

Answer:0.483

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

xP(x)00.2510.0520.1530.55Find the standard deviation of this probability distribution. Give your answer to at least 2 decimal pl

Nookie1986 [14]

The Solution:

Given:

Required:

Find the standard deviation of the probability distribution.

Step 1:

Find the expected value of the probability distribution.

$E(x)=\mu=\sum_{i\mathop{=}0}^3x_iP_(x_i)$ $\begin{gathered} \mu=(0\times0.25)+(1\times0.05)+(2\times0.15)+(3\times0.55) \\ \\ \mu=0+0.05+0.30+1.65=2.0 \end{gathered}$

Step 2:

Find the standard deviation.

$Standard\text{ Deviation}=\sqrt{\sum_{i\mathop{=}0}^3(x_i-\mu)^2P_(x_i)}$ $=(0-2)^2(0.25)+(1-2)^2(0.05)+(2-2)^2(0.15)+(3-2)^2(0.55)$ $=4(0.25)+1(0.05)+0(0.15)+1(0.55)$ $=1+0.05+0+0.55=1.60$

Thus, the standard deviation is 1.60

Answer:

1.60

8 0

1 year ago

A) 7.7 ft<br> b) 13.4 ft<br> c) 10.3 ft<br> d) 12.3 ft

ELEN [110]

Answer:

D. 12.3 ft

Step-by-step explanation:

This problem requires the use of trigonometric ratios. This one specifically uses the cosine ratio as it provides the hypotenuse and is asking for the side that is adjacent to the angle.

cos(40°)=a/16

cos(40°)×16=a/16×16

cos(40°)×16=a

a=12.256 ft

The length of side a is D. 12.3 ft.

3 0

3 years ago

PLZ HELP WITH MATH

Ann [662]

Answer:

Step-by-step explanation:

the normal equation is 120 and c is 120

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3 years ago

What are the variables for question 5, problem a, I don't quite understand.

valentinak56 [21]

One variable is the amount of time it takes her to make a plate. The other variable is the amount of time it takes her to make a cup.

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3 years ago