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
alexandr1967 [171]
3 years ago
14

What is (2.1 10^3) (4 10^ 7)?

Mathematics
1 answer:
brilliants [131]3 years ago
4 0
8.4×10^10 or 84000000000
You might be interested in
Find the general solution of (2x² + y)dx + (x²y - x)dy = 0​
dmitriy555 [2]

Multiply the original DE by xy:

xy2(1+x2y4+1−−−−−−−√)dx+2x2ydy=0(1)

Let v=xy2, so that dv=y2dx+2xydy. Then (1) becomes

x(y2dx+2xydy)+xy2x2y4+1−−−−−−−√dxxdv+vv2+1−−−−−√dx=0=0

This final equation is easily recognized as separable:

dxxln|x|+CKxvKx2y2−1K2x4y4−2Kx2y2y2=−dvvv2+1−−−−−√=ln∣∣∣v2+1−−−−−√+1v∣∣∣=v2+1−−−−−√+1=x2y4+1−−−−−−−√=x2y4=2KK2x2−1integrate both sides

8 0
2 years ago
If the equation of a circle is (x + 5)2 + (y - 7)2 = 36, its radius is:
andrey2020 [161]

Answer:

6

Step-by-step explanation:

The number on the right side of the equal side represents the radius, HOWEVER, it is squared, therefore you must square root it to get 6

5 0
3 years ago
Need help on these three. thanks:))
Anton [14]
1. 0.3% or 30%
2. 15 minutes
3. 48 times
4 0
3 years ago
Mr. Jones and Mr. Smith both plan to retire in 5 years. Mr. Jones has invested $250 per
nataly862011 [7]

Answer:

i don't know, i just want to know if you got it right

Step-by-step explanation:

6 0
3 years ago
Writing lan's car can go 217 miles on 7 gallons of gas. During a drive last weekend, lan used
jolli1 [7]

Answer: Ian would have drove 91 miles using only 3 gallons of gas.

Step-by-step explanation: I used paper and pencil and used a T-chart putting one section at the top “gallons” and the other “miles”; under gallons I put 7 because the question stated with “7 gallons of gas”; under miles I put 217 because the question states that with 7 gallons of gas Ian’s car travels 217 miles so using the T-chart I want to simply the 7 gallons of gas to one gallon of gas to figure out how miles Ian’s car would go only using 3 gallons of gas; by dividing 7 by 7 giving me 1, and with a T-chart you wanna do the same thing to both sides meaning I divided 217 by 7 as well giving me 31 for 1 gallon of gas, meaning Ian’s car would travel 31 miles with only using 1 gallon of gas. After I find that answer I go to multiply the 1 under “gallons” by 3 to and again, if you do it to one side you have to do it to the other meaning I multiplied 31 my 3 as well; giving me 91. Meaning with only using 3 gallons of gas Ian’s car would travel 91 miles!

3 0
2 years ago
Other questions:
  • Sylvia took three times in a video game she scored -120 points during her first turn 320 points in her second time and -80 point
    8·1 answer
  • The lengths of sides of a right triangle are 16 meters, 30 meters, and 34 meters. The triangle is dilated by a scale factor of 4
    7·1 answer
  • A special liquid is held in a tank described as (x 2 + y 2 ) ≤ z ≤ 1 in a Cartesian coordinate system. Assume that the density o
    15·1 answer
  • Need help a.s.a.p
    12·1 answer
  • How is statement B related to statement A?
    15·1 answer
  • Tina rode her bike a distance of 40 kilometers. How many miles did Tina ride? (1 mile ≈ 1.6 kilometers)
    7·1 answer
  • Can someone help me ​
    5·1 answer
  • A zucchini plant in Darnell’s garden was 10 centimeters tall when it was first planted. Since then, it has grown approximately 0
    6·1 answer
  • Prem earns Rs. 16000 a month. He spends half of his income on food, three - tenth of the remaining income on house rent and Rs.
    9·1 answer
  • Selena earned $200 last month babysitting. She used 25 of her earnings to buy a video game. How much did she spend on the video
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!