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Ostrovityanka [42]
3 years ago
11

Find the exponential function that satisfies the given conditions:

Mathematics
2 answers:
padilas [110]3 years ago
8 0

Answer:

a = starting amount = 67

r = rate = 0.47% = 0.0047

t = week

swat323 years ago
4 0

<u>Answer-</u>

<em>The exponential function that satisfies the given conditions is f(t)=67(0.9953)^t</em>

<u>Solution-</u>

This can be represented as exponential decreasing function,

f(t)=a(1 - r)^t

Where,

  • a = starting amount = 67
  • r = rate = 0.47% = 0.0047
  • t = week

Putting the values,

\Rightarrow f(t)=67(1 - 0.0047)^t

\Rightarrow f(t)=67(0.9953)^t

Therefore, the exponential function that satisfies the given conditions is

f(t)=67(0.9953)^t

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Identify the type of observational study​ (cross-sectional, retrospective, or​ prospective) described below. A research company
Sindrei [870]

Answer:

Prospective study

Step-by-step explanation:

<em>A cross-sectional study, also known as transverse study, is a type of observational study that analyzes data from a population at a specific point in time.</em> This kind of observation is used if cases cannot be identified a priori or if the prevalence of the disease or condition needs to be determined.

Cohort studies are when two or more groups of subjects are followed over time to see if they develop some disease or if some event occurs, there are two type of cohort studies, prospective and retrospective. <em>Prospective studies (or follow-up studies) follow subjects with different exposures until some point in time where something happens or the study ends</em>, r<em>etrospective studies use historical data</em> to make comparisons based on risk factors or exposures that occurred before the events.

Considering the information given and the observational study exposed to the question, we can conclude that we are talking about a prospective study because data is collected over the next 10 years.

I hope you find this information useful and interesting! Good luck!

7 0
2 years ago
Tyler deposited $100 into a savings account for 6 years. The account earns 5% simple annual interest. 1. How much money will Tyl
Sladkaya [172]
100$×0.05= 5 $ is her annual interest
qusetion number 1 . 5$× 6 years = 30 $
for question number 2 . 100$+30$=130$
5 0
2 years ago
Write a rule for the nth term of the arithmetic sequence described below.
belka [17]

Answer:

an = 115 + (n - 1) (-6)

a25 = - 29

Step-by-step explanation:

We use the definition for the nth term of an arithmetic sequence:

an = a1 + (n - 1) d

a5 = 91 = a1 + (5 - 1) d

91 = a1 + 4 d

a20 = 1 = a1 + (20 - 1) d = a1 + 19 d

1 = a1 + 19 d

now we subtract term by term one expression from the other

90 = 4 d - 19 d

90 = - 15 d

divide both sides by -15 to isolate d

d = 90 / (-15) = -6

Now we can calculate what a1 is using for example:

1 = a1 + 19 d

1 = a1 - 114

add 114 to both sides:

115 = a1

Then our general expression for the sequence is:

an = 115 + (n - 1) (-6)

We can now use it to calculate the value of a25:

a25 = 115 + (24) * (-6) = -29

7 0
2 years ago
use the substitution method to solve the system of equations choose the correct orderd pair. 3x-y=7 2x-2y=2
sergey [27]

Answer:

(3,2)

Step-by-step explanation:

We are given the system:

3x-y=7

2x-2y=2.

We are asked to solve this by substitution.  We need to pick an equation and pick a variable from that equation to solve for that variable.

I really like either for this.  Some people might go with the first one though. Let's do that.  I will solve the first one for y.

3x-y=7

Subtract 3x on both sides:

   -y=-3x+7

Divide both sides by -1:

     y=3x-7

Now we are ready for substitution.  We are going to plug this equation into the second equation giving us:

2x-2y=2 with y=3x-7 gives us:

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

Distribute:

2x-6x+14=2

Combine like terms:

-4x+14=2

Subtract 14 on both sides:

-4x      =2-14

Simplify:

-4x       =-12

Divide both sides by -4:

  x       =-12/-4

Simplify:

 x         =3

So using y=3x-7 and x=3, I will find y now.

y=3x-7 if x=3

y=3(3)-7   (I inserted 3 for x since we had x=3)

y=9-7       (Simplified)

y=2           (Simplified)

The answer is (x,y)=(3,2).

6 0
2 years ago
Pls help me!!!! BRAINLIEST!!!!!!!
Georgia [21]

Answer:

-1/2

Step-by-step explanation:

(-2, 5)

(3, 5)

3-(-2) over -5-5

= 5/-10

= -1/2

8 0
2 years ago
Read 2 more answers
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