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
Maurinko [17]
3 years ago
6

On average, a person’s heart beats about 4.2×107 times per year. There are about 7,600,000,000 people in the world. Use this dat

a to approximate the number of heartbeats for all the people in the world per year. Expressing your answer in scientific notation in the form a×10b, what are the values of a and b?
Mathematics
1 answer:
gayaneshka [121]3 years ago
5 0

Answer:

a=3.192  b=17

Step-by-step explanation:

I just used a graphing calculator to multiply the req. numbers

You might be interested in
Set G is the set of positive integers divisible by 4 and Set F is the set of perfect
Natalka [10]

<em>Greetings from Brasil...</em>

G = {4; 8; 12; 16; 20; 24; 28; 32; 36; 40; 44; 48; 52; 56; 60; 64; 68; 72; 76; 80; 84; 88; 92; 96; 100; 104; ...}

F = {1; 4; 9; 16; 25; 36; 49; 64; 81; 100; ...}

So, according to the statement, it is desired:

G ∩ F - the intersection between the 2 sets, that is, which numbers are present simultaneously in the 2 sets....

Looking at the sets we conclude that

<h2>G ∩ F = {4; 16; 36; 64; 100}</h2><h2 /><h2 />

<em>OBS: note that in truth G are the multiples of 4</em>

4 0
3 years ago
Brainliest answer to the one who will be first and correctly.
inessss [21]

Answer:

21

Step-by-step explanation:

dog = 35/85 = x/51

=> x = 35 x 51 / 85 = 7 x 51 / 17 = 21

4 0
3 years ago
Read 2 more answers
A sum of money is divided among Khairul, Michael and Ethan in the ratio
Leto [7]

Answer:

$360

Step-by-step explanation:

The intial ratio of the sum shared between Khairul, Michael and Ethan is 6 : 4 : 5.

This would be 6x : 4x : 5x

Khairul gives $30 to Michael and $15.

The ratio is. Now;

(6x - 45) : (4x + 30) : (5x + 15)

We are told this is equal to the ratio 7:6:7

Thus;

((6x - 45) + (4x + 30))/(5x + 15) = (7 + 6)/7

(10x - 15)/(5x + 15) = 13/7

Factorize the left hand side;

5(2x - 3)/5(x + 3) = 13/7

5 will cancel out to get;

(2x - 3)/(x + 3) = 13/7

Cross multiply to get;

7(2x - 3) = 13(x + 3)

14x - 21 = 13x + 39

14x - 13x = 39 + 21

x = 60

Amount Khairul had initially was denoted as 6x.

Thus,6x = 5 × 60 = $360

3 0
3 years ago
12. Erma has her eye on two sweaters at her favorite clothing store, but she has been waiting
lina2011 [118]

Answer:

Step-by-step explanation:

6 0
3 years ago
a water sprinkler sends water out in a circular pattern. How many feet away from the sprinkler can it spread water if the area f
andrew11 [14]

Answer:

11 feet

Step-by-step explanation:

Area formed by the watery pattern is 379.94 square feet.

Since the water is being sent out in circular pattern, the maximum distance at which the water is reaching out will be equal to the radius of the circle as the sprinkler is at the center of the circle.

Area of a circle is given as:

Area=\pi r^{2}\\\\ 379.94 = \pi r^{2}\\\\r^{2}=\frac{379.94}{\pi}\\\\ \text{Using pi equal to 3.14, we get}\\\\ r^{2}=121\\\\ r = 11

This means the radius of the circular pattern being formed is 11 feet. So the sprinkler can spread the water 11 feet away from it.

3 0
3 years ago
Other questions:
  • Solve.
    13·1 answer
  • Is this right or not
    12·1 answer
  • Customer: “What can I do to decrease my bill by $25.00 per month?”
    11·2 answers
  • The axis of symmetry for a quadratic equation can be found using the formula x =-b/2a , where a and b are coefficients in the qu
    11·2 answers
  • Select the pair of consecutive integers between which a real zero of f(x) = x^3 + 5x^2 –x – 6 exists.
    5·1 answer
  • Boys to girls ratio is 2 to 3. There are 18 girls. What is total number of students
    11·2 answers
  • A factory can work its employees no more than 6 days a week, and no less than 2 days per
    15·1 answer
  • Select whether each equation has no solution, one solution, or infinitely many solutions.
    8·2 answers
  • The area of a rectangle is 588 in^2. The ratio of the length to the width is 4:3. Find the length and the width
    15·1 answer
  • Jack designed a bridge that will be 0.2 miles long and 0.6 of the bridge has been built. How long is the section of the bridge t
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!