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
Marat540 [252]
3 years ago
8

Andre and Elena knew that after 28 days they would have 2²⁸ coins, but they wanted to find out how many coins that actually is.

Andre wrote: 2 28 = 56. Elena said, "No, exponents mean repeated multiplication. It should be 28 28, which works out to be 784." Do you agree with either of them? Explain your reasoning.
Mathematics
1 answer:
vlada-n [284]3 years ago
6 0

Answer:

I agree with none of them

Step-by-step explanation:

Given

Expression= 2^{28}

Andre: 2 * 28 = 56

Elena: 28 * 28 = 756

Required

Who is correct?

Expression= 2^{28}

When we apply law of indices to the above, it gives 2 multiplies by itself in 28 places

i.e.

Expression= 2^{28}

Expression= 2*2*2*..........*2 ---- in 28 places

Andre's interpretation of the expression is incorrect as:

2^{28} \neq 56

Also, Elena's expression is incorrect.

This is so, because

2^28 \neq 28*28

<em>Hence, both of them are incorrect and I agree with none of them</em>

You might be interested in
Brooke cooked a 4/1/3-pound lasagna in 1/1/3 hours. How many hours per pound did it take to cook the lasagna?
Hitman42 [59]

Answer:

4/13 hours

Step-by-step explanation:

Total pounds of lasagna = 4 1/3 pounds

Total time taken to cook = 1 1/3 hours

How many hours per pound did it take to cook the lasagna?

Hours per pound of lasagna = Total time taken to cook / Total pounds of lasagna

= 1 1/3 hours ÷ 4 1/3 pounds

= 4/3 ÷ 13/3

= 4/3 × 3/13

= 4/13 hours

It will take 4/13 hours to cook each pound of the lasagna

3 0
4 years ago
Jillian rows 20 km in 1 hour. Compute Jillian's speed in m/s.
pashok25 [27]

Answer:

B

Step-by-step explanation:

jzjzisisisjsjsjsjsjsjshha

7 0
3 years ago
A cylindrical glass is 3 inches in diameter and 6.5 inches tall. How much water can the glass hold when full? Round your answer
Vitek1552 [10]
3 inches diameter mean 1,5 in the radius 
the height is 6,5 in.

volume of a cylinder = area of base time height 

V= pir^2 *h

V = 3,14*1,5^2 *6,5

V = 45,92 in^3

hope helped 
3 0
4 years ago
WILL GIVE BRAINLIEST!
Nookie1986 [14]

Step-by-step explanation:

Explanation:

First, we must solve the equation for y to determine the slope: y = 2x + 3/2

By looking at the coefficient in front of x, we know that the slope of this line has a value of 2. To fine the slope of any line perpendicular to this one, we take the negative reciprocal of it:

slope = m , perpendicular slope = – 1/m

slope = 2 , perpendicular slope = – 1/2

3 0
3 years ago
Read 2 more answers
What does it mean when a line changes and you translated
dsp73
Translation means you are shifting the line either up or down.
3 0
3 years ago
Other questions:
  • 3m-5p=12 solve for p
    10·2 answers
  • State whether each ratio forms a proportion.
    11·1 answer
  • Can anyone explain this to me??
    13·1 answer
  • The altitude of a triangle is increasing at a rate of 1.500 centimeters/minute while the area of the triangle is increasing at a
    8·1 answer
  • Find the sum of a polynomials -4xsquare 9x-3 and 7xsquare-5x 4
    14·1 answer
  • Solve for x.<br> y=5x<br> y=30<br> Simplify your answer as much as possible.
    13·2 answers
  • find the measure of the angle marked with a? Using inverse trig functions. Round your answer to the nearest degree. part 3​
    9·2 answers
  • What are two other negative integers that have the same sum as -2 and -5​
    15·1 answer
  • Name the constant of variation for y equals 1/4x then find the slope of the (0,0) and (4,1)... please
    6·1 answer
  • indicate whether the measures 8, 14, and 16 can be the side lengths of a triangle. if they can, classify the triangle.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!