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Marta_Voda [28]
3 years ago
14

A few weeks into the deadly SARS (Severe Acute Respiratory Syndrome) epidemic in 2003, the number of cases was increasing by abo

ut 4% each day.† On April 1, 2003 there were 1,804 cases. Find an exponential model that predicts the number
Mathematics
1 answer:
DaniilM [7]3 years ago
6 0

Answer: The required exponential model is 1804(1.04)^t

Step-by-step explanation:

Since we have given that

Initial cases = 1804

Rate of growth = 4%

Since it is increasing exponentially,

So, it becomes,

A=ab^t

Here, a = 1804

b = 1+r=1+0.04=1.04

So, it becomes,

A=1804(1.04)^t

Hence, the required exponential model is 1804(1.04)^t

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rjkz [21]

Answer:

\sqrt{(x - 7) \div 4}

6 0
3 years ago
Read 2 more answers
Landen spent L hours at the beach last weekend. Matéo spent 15% fewer hours at the beach than Landen did.
andre [41]

Answer:

L(1-0.15)

L-(15/100)L

Step-by-step explanation:

we  know that

100%-15%=85%

85%=85/100=0.85

so

The number of hours that Mateo spent at the beach last week is equal to the hours that landen spent at the beach (L) multiplied by 0.85

The linear equation that represent this situation is

0.85L  

<u><em>Equivalent expressions are</em></u>

1) L(1-0.15)

Because

Applying distributive property

L(1-0.15)=L-0.15L

Combine like terms

L-0.15L=0.85L

2) L-(15/100)L

because

15/100=0.15

substitute

L-(15/100)L=L-(0.15)L=0.85L

8 0
3 years ago
The data set represents a month-to-month progression of gasoline prices over the course of several months in an unspecified city
mash [69]

Answer:

The correct option is a.

Step-by-step explanation:

The general form of a quadratic regression equation is

y=ax^2+bx+c                         ..... (1)

Using graphing calculator we get

a=-0.143393\approx -0.143

b=0.59525\approx 0.595

c=2.82964\approx 2.830

Substitute these values in equation (1) to find the quadratic regression equation for this data set.

y=-0.143x^2+0.595x+2.830

Therefore the correct option is a.

4 0
3 years ago
An item cost $360 before tax and the sale tax is 21.60
Zigmanuir [339]

The total cost of the item with sales tax will be $ 381.6.

<h3>What is Algebra?</h3>

The analysis of mathematical representations is algebra, and the handling of those symbols is logic.

An item cost $360 before tax and the sale tax is 21.60.

Then the total cost of the item with sales tax will be

Total cost = 360 + 21.6

Total cost = $ 381.6

More about the Algebra link is given below.

brainly.com/question/953809

#SPJ1

4 0
2 years ago
What is the simple interest on $4,500 for 2 and a half years at 4% per year
ELEN [110]

Answer: $350

Step-by-step explanation:

Interest =PRT/100

Interest =$4500 times 2 times 4 /100

Interest = $36000 / 100

Interest = $360

4 0
3 years ago
Read 2 more answers
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