1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
puteri [66]
3 years ago
11

How do you answer a, b and c, answers and also how you worked it out

Mathematics
1 answer:
Kruka [31]3 years ago
4 0

We can either convert to standard form first or convert to a common multiplier, kinda like a common denominator.  The latter makes more sense if they wanted the result in scientific notation, but let's do it that way anyway.

a)

4.5 × 10⁴ + 3.8  × 10³ = 45 × 10³ + 3.8  × 10³ = 48.8× 10³ = 48,800

Answer:  48,800

b)

4.5 × 10⁴ - 3.8  × 10³ = 45 × 10³ - 3.8  × 10³ = 41.2× 10³ = 41,200

Answer:  41,200

c)

7.2 × 10⁻³ + 6.3  × 10⁻² = 7.2 × 10⁻³ + 63  × 10⁻³ = 70.2 × 10⁻³

       = 7.02 × 10⁻² = 0.0702

Answer: 0.0702

You might be interested in
Nick is now 7 times as old as harry. in 6 years, nick will be 5 times as old as harry. how old will harry be in 6 years?
zalisa [80]
Let,
Harry's age - x then Nick is 7x. 
After 6 years, Harry is  x+6 and Nick is 7x+6
So, 7x+6= 5(x+6)=> 2x = 30-6X = 12
In 6 years, Harry will be 12+6 = 18 years (Ans)



5 0
3 years ago
Read 2 more answers
Which body parts do birds have? scales, teeth, and beaks feathers, beaks, and hair feathers, beaks, and teeth feathers, beaks, a
Annette [7]

Answer:

head, back, throat, breast, wings, tail, and legs

7 0
3 years ago
Read 2 more answers
Here is some information about a play starts at 7:30pm first act last 46 minutes interval lasts 20 minutes second act last 53 mi
Yuki888 [10]

Answer:

9:29 PM

Step-by-step explanation:

Let us add the number of minutes the first act, interval and second act lasted:

46 + 20 + 53 = 119 minutes

Converting this to hours and minutes:

60 minutes = 1 hour

119 minutes = 1 hour 59 minutes

Therefore, the time that the second act ends is:

  H       M

  7   :   30 PM

+ <u> 1    :  59</u>  

 <u> 9   :   29 </u>

<u />

The second act will end by 9:29 PM

8 0
3 years ago
A resturant orders 50 pounds of hamburger every week.they sell six pounds of hamburger every day.how much hamburger is left at t
murzikaleks [220]

Answer:

8 pounds

Step-by-step explanation:

6 pounds of hamburger x 7 days a week = 42 pounds of hamburger used

50 - 42 = 8 pounds of unused hamburger at the end of the week

6 0
3 years ago
Simplify this problem
andrey2020 [161]

Answer:

-22 1/2

Step-by-step explanation:

-2 1/2 *s

Let s = 9

-2 1/2 (9)

Change to an improper fraction

-5/2 *9

-45/2

Change back to a mixed number

-22 1/2

8 0
3 years ago
Other questions:
  • How long does $1250 have to be deposited at a simple interest rate of 2 1/2% before the balance is tripled?
    9·1 answer
  • Examine the following diagram:<br><br><br> What is the measure of ∠DBC?
    5·2 answers
  • What is the range of f(x) = |-x|? y ≤ 0 y ≥ 0 y = 0 all reals
    14·1 answer
  • What is the number sequence 3 4 6 9 13 18 24?
    8·2 answers
  • Solve for x 5x-4_&gt;12 and 12x+5&lt;_-4
    13·1 answer
  • A model rocket is built to the scale 1:20, or 1 inch - 20 feet. The actual rocket is 4440 feet
    8·2 answers
  • At the start of the challenge, Marisol is able to complete 32 sit-ups and plans to increase the number of sit-ups she completes
    15·1 answer
  • I need help with this because i dont know this please send help....
    7·2 answers
  • What is the answer 4ax²-3b+12x²-a =​
    11·1 answer
  • Help this has to be don today or my grade on it will be a 60
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!