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3 years ago

Pls help will give brainliest answer and 5star

Mathematics

1 answer:

Ipatiy [6.2K]3 years ago

6 0

1. Which polygon or polygons are regular?

A regular polygon is a polygon that is equiangular (all angles are equal in measure) and equilateral (all sides have the same length).

Therefore your answer is:

A. equilateral triangle

C. square

2. Which polygon is always irregular?

traingle - NOT (equilateral triangle)

trapezoid - YES

square - NOT

hexagon - NOT (regular hexagon)

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The equation a = 1300(1.02)7 is being used to calculate the amount of money in a savings account. what does 1.02 represent in th

yaroslaw [1]

For this case we have an equation of the form:
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3 years ago

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3 years ago

A virus that initially infected four people is spreading at a rate of 15% each week.

Solnce55 [7]

Answer:

"f(x) = 4(1.02)7x; spreads at a rate of approximately 2% daily"

Step-by-step explanation:

Complete Question:

A virus that initially infected four people is spreading at a rate of 15% each week. The following function represents the weekly spread of the virus: f(x) = 4(1.15)x. Rewrite the function to show how quickly the virus spreads each day and calculate this rate as a percentage.

f(x) = 4(1.15)7x; spreads at a rate of approximately 1.5% daily

f(x) = 4(1.02)7x; spreads at a rate of approximately 2% daily

f(x) = 4(1.157)x; spreads at a rate of approximately 2.66% daily

f(x) = 4(1.02)x; spreads at a rate of approximately 0.2% daily

Solution:

The weekly number of people infected would be:

$f(x)=4(1.15)^x$

7 days in a week, so daily number of people infected would be:

$f(x)=4(1+r)^{7x}$

To find daily rate, we set these 2 equations equal and solve for r:

$4(1.15)^x=4(1+r)^{7x}\\1.15^x=(1+r)^{7x}\\1.15^x=((1+r)^7)^x\\1+r=1.02\\r=1-1.02=0.02$

That is 0.02*100 = 2% daily

2nd answer choice is right.

8 0

3 years ago