MATHEMATICS MIDDLE SCHOOL

I have 4 math questions that I don't understand. Please help!?




b^-3=1/216 b=?
743.8 × 103=?
36 ÷ 10–3=?
What is (2.1 × 103) × (4 × 10–7)?

Answers

Answer 1
Answer:
-- A negative exponent means the number is in the denominator.
    b⁻³  means  1/b³ .
   So  1/b³ = 1/216 .                      You can do it now.

-- If that number is " 10³ ", it means 1,000 .
   If that number is " 103 " and you can't remember
   how to do multiplication with a pencil, then you'll
   have to use your calculator.

-- Again ...  10⁻³  means  1/10³  or  1/1000 .
   So the problem is really  36 divided by  1/1000 .
   Be very careful.  That means  36 x 1000 .

-- To multiply powers that have the same base,
   you add the exponents.

   Example:    10⁴  times  10⁵  =  10⁹ .

   This question can be rearranged as      (2.1 x 4) x (10³ x 10⁻⁷)

                                                                 (10³)  times  (10⁻⁷)   is  10⁻⁴  .

Related Questions

!!!!!!!50 points!!!!!!!! QUESTION BELLOW HELP ASAP!!!!!!!!!
In ΔABC, if the length of sides a, b, and c are 3.5 centimeters, 5.5 centimeters, and 6 centimeters respectively, what is m∠C to two decimal places
LEIM deposits some money in an account which pays 5% simple interest per year, and twice that amount in an account paying 4% simple interest per year. If he collects $533.00 in interest after one year, how much did he deposit in the account that has a 5% rate?
Simplify the product using the distributive property. (2h-3)(3h+4)
How many whole ones in 24 quarters

Is 8 yd greater than 288 in.

Answers

3 feet is equal to 1 yard and 3 feet is 36 inches. 288 inches divided by 36 is 8 so 8 yards is equal to 288 inches.
I believe they are the same since one yard is 36 in, so 8x36 is 288. Hope i helped :)

I need help with thisA DVD movie sells for $29 and the sales tax is 5.5%. What is the total cost of the movie to the nearest penny? Show your work to earn credit.

Answers

29×5.5=159.5 slide the decimal 2 places to the left, so you get 1.595. That rounds up to $1.60. So $29.00+$1.60=$30.60
first you turn the tax percent into a decimal, then multiply by 29 dollars.
the answer you get from multiplying you will add that to 29 $

Marco borrowed $150 from his brother.He has paid him back 30% so far.How much money does Marco still owe his brother?

Answers

150*30% = $45
$150-$45 = $105

Marco still owes his brother $105
Michael still owes his brother $105

Let t = 5.

What is the value of 5t – 5?

Answers

If t=5, you just need to substitute 5 for t in the equation and solve, so

5(5) - 5
25 - 5 = 20

Hope this helped :)
5(5)-5
25-5
=20
is the answer

What is the value of 8P4? a.40,320 b.1680 c.32 d. 24

Answers

Answer:

1680

Step-by-step explanation:

We are find the permutations of 8 permute 4

8!/(8-4)!=   where ! means factorial

8!/ 4!

8*7*6*5*4*3*2*1

-------------------------

4*3*2*1

Canceling the 4,3,2,1

We are left with

8*7*6*5

---------------

1

1680

An interior angle of a regular polygon is eleven times its exterior Work out the number of sides of the polygon
Thank you x

Answers

I think they answer might be ....... /7
Other Questions
a counselor at sleepy hollow camp has 225 yards of lanyard to give to 100 campers to make landyard key chains. Each camper will get the same length of landyard. How much landyard will each camper get.
Mr. Ramos invests $600 at a simple interest rate of 6%. How much interest will he earn in one year? Please show work!!!!!
A cylinder has height 10 cm and volume 42 cm'. An enlargement of thecylinder has height 25 cm. Calculate the volume of the enlarged cylinder.ANSWER:
Urgent!!! PLEASE HELP, FAST!!!All the items on the sale rack were 75 percent off their original price. (empty table is shown)If Jill bought an item on the sale rack and saved a total of $84, what is the value of x in the table above? (x=1/4)84 = 3/4how much is 1/4?possible answers:$21$28$84 - not$112 - not