How do I right 0.389 in expanded form

Answers

Answer 1
Answer: 0.389= (3x1/10)+(8x1/100)+(9x1/1,000=

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A bag contains 30 marbles, 3 of which are blue, 20 are red, 5 are green, and 2 are purple. Emerson takes a marble out of the bag, records the color, and returns it to the bag. How many purple marbles should he expect after 300 trials?

Answers

20 purple marbles.
2/30 is the probabilty of getting a purple marble when there is 30 marbles.
2/30=20/300.

Answer:

20

Step-by-step explanation:

I did the FLVS quiz

Mr. Anderson drove 168 miles in 3 1/2 hours. He then drove the next 2 1/4 hours at a rate of 5 miles per hour faster than the first rate. How many miles did Mr. Anderson drive during the 5 3/4 hour road trip? Answer in improper fraction.

Answers

First we need to know how many miles per hour they drove the first time. This would be found by division. 168/3.5=48
Then we need to add 5 miles per hour for the average.48+5= 53
Next we need to multiply 2 1/4 by the new miles per hour 53*2.25=119.25
After that we need to know how many miles they drove 119.25+168=287.25 miles.
Finally to get an improper fraction we need to change 287.25 miles to it.
We already have 1/4 for .25 so we multiply 287 by 4 and add it to the 1/4 we already have and it makes it out to be 1149/4

Hope this helps!

What is (3.5 x 10 to the fourth) to the secondwhen written in scientific notation with four significant digits?

Answers

so that is 3.5 times 10000 or 35000
then it is squared so 1,225,000,000 but to four significant digits it would be 1225 times 10^6 or on a online test 1225e+06
Exponents raised by exponents are resolved by multiplying the two exponents together . . . so distribute the exponent to the paranthesis

note:
3.5 = 3.5^1

(3.5 x 10^4)^2

(3.5^1*2 x 10^(4*2))

(3.5^2 x 10^8)

12.25 x 10^8

1.225 x 10^9

Compare rates of change.A. The equation below can be used to find the length of a foot or forearm when you know one or the other.

(length of the foot) = 0.860 • (length of the forearm) + 3.302

If you let y = length of the foot and x = length of the forearm, this equation can be simplified to
y = 0.860x + 3.302.

Using this equation, how long would the foot of a person be if his forearm was 17 inches long?

B. What is the rate of change of the equation from Part A?

Compare the equation from Part A to your data. Are they the same? Which has a greater rate of change? Why do you think the values are different?

C. Is the relation in your data a function? Why or why not? Could the equation in Part A represent a function? Why or why not? Explain your answer.

Answers

y=foot
x=foram

A. easy, plug 17 for x and evaluage for y
y=0.860(17)+3.302
y=14.62+3.302
y=17.922 inches


B. rate of change is slope
y=mx+b
m=slope
so
rate or change is 0.860 inches per legnth of forarm

C. what data

D. it is a function
since it is 1st degree (no exponents greater than 1 on the placeholder), and it is not a vertical line
it is a function

Step-by-step explanation:

Part A:

y=0.860x + 3.302

y= 0.860(17) + 3.302

y= 14.62 + 3.302

y=  17.922

Part B:

step 1

y=0.860x + 3.302

y= 0.860(17) + 3.302

y= 14.62 + 3.302

y=  17.922

step 2

y=0.860x + 3.302

y= 0.860(18) + 3.302

y= 15.48 + 3.302

y= 18.782

step 3

18.782-17.922=.86

So, the rate of change is .86

Hope it helps!!

An angle that measures 82° is bisected. What is the measure of each resulting angle?A)38° and 44° B)40° and 42° C)41° and 41° D)42° and 42°

Answers

The measure of each resulting angle is 41° and 41°. Option C is correct.

Given that,
An angle that measures 82° is bisected, To determine is the measure of each resulting angle.

What is an angle bisector?

An angle bisector is the line segment that bisects the angle into two equal halves.

What is simplification?

The process in mathematics to operate and interpret the function to make the function or expression simple or more understandable is called simplifying and the process is called simplification.

Here,
bisecting of angle measure 82°.
= 82 / 2
= 41°  

Thus, the measure of each resulting angle is 41° and 41°. Option C is correct.

Learn more about angle bisector here,

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When an angle is bisected, it is cut exactly in half.

82/2 = 41.

The resulting two angles will each be 41 degrees.

Your answer is C.

Choose the inequality that represents the following graph

Answers

Graphing Inequalities on either a number line or in the coordinate plane helps to visualize the the several forms of the inequality. The inequality that represents the given graph is x>-1. Thus option C is the correct option.

Given information-

In the given graph a number line is represents the negative five to the positive five numbers.

Graphing inequalities

Graphing Inequalities on either a number line or in the coordinate plane helps to visualize the the several forms of the inequality. There is some signs which helps to represents these inequalities to represent on the mathematical form.

Sign "<" is used refer the less than amount, sign ">" is used refer the greater than amount, sign "\leq" is used refer the less than or equalto amount and sign "\geq" is used refer the greater than or equal to amount .

In the given graph a number line is shown with an open circle on point -1 and shaded the number which are grater than the number -1.

Thus we use the grater than sign for x. Now x can be any value which is greater than negative one hence we can represent the given graph with the inequality x>-1.

Hence the inequality that represents the given graph is x>-1. Thus option C is the correct option.

Learn more about the Graphing inequalities here;

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