Please help and explain. :)

Answers

Answer 1

Answer:

a. Okay, so you multiply the 4.7 and 2.9 together, and then add the exponents

13.63 * 10^10

But we are not done. There can only be one digit in front of the decimal point. So, you move the 13.63 back one place so 1.363. But we have to do this to both sides, so the answer is 1.363 * 10^11.

b. Now you divide the 5.8 and 2, and subtract the exponents.

2.9 * 10^-5

The negative exponent is fine in this case if you were wondering.

c. Expand the scientific notation to 1500, then add the 2491 and then put that in scientific notation is what I would do. You can also express 2491 in scientific notation and add them. Either way you will get 3.991 * 10^3

d. Same thing here except with subtraction. The answer is 6.5 * 10^-4.

This was a little long, sorry. Let me know if you need further explanation. I hope this helps.

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The cost C (in dollars) of making n feet of cabinet is represented by C = 18n + 45.How many feet of cabinet are made when cost is $144?

Answers

The amount of board is 5.5 feet because 18*5.5=99 and 144-45 is 99.

9/10 divided by (1/10 plus 2/5)

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$\boxed{ ( (9)/(10) )/(( (1)/(10) + (2)/(5) )) = ( (9)/(10) )/( (1)/(2) ) = (9)/(10) . (2)/(1) = (18^(/2))/(10^(/2)) ~\to~\boxed{ (9)/(5)} }$

1.8 is the answer

1/10+2/5 is equal to 0.5

That divided by 9/10 is 1.8 or 1 8/10

Please help. Brainliest for the best explanation.

Answers

Explanation of what exactly

How to write 3 9/100 into a decimal?

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How do you write 39/100 into a decimal form is by simply dividing 39 to 100.
Hence,
1. 39 / 100 = 0.39

0.39 is the decimal form of the given value.
Other examples can include:
1. 100 / 1000 = 0.1
2. 45 / 10 = 4.5

How do you write 39/100 into a decimal form is by simply dividing 39 to 100.

Hence,

1. 39 / 100 = 0.39

0.39 is the decimal form of the given value.

Other examples can include:

1. 100 / 1000 = 0.1

2. 45 / 10 = 4.5

8x{[(7+4)x2]-[(11-7)x4]}

Answers

Well, think about the Order of Operations here. The normal parenthesis are the first to get solved.
8x{[(11)x2]-[(4)x4]}
Next, the brackets.
8x{[22]-[16]}
After the Brackets come the braces.
8x{6}
And finally, just multiply.
The answer is
48
Hope it Helps! :)

This is your answer -8x3 • (4x2 - 11)

Disjoint subsets A and B of a universal set U, except assume that n(U)=120, n(A)=45, and n(B)=50.Then n(A′∪B)=