I really need this ASAP

A scientist is studying the growth and development of an epidemic virus with a growth rate of 9% per month that has infected 3,1

4vir4ik [10]

Answer:

About 6,785 people will be infected about nine months.

Step-by-step explanation:

We can write an exponential function to represent the situation. The standard exponential function is given by:

$\displaystyle f(x) = a(r)^x$

Where a is the initial value, r is the rate, and x, in this case, is the time that has passed in months.

3,124 people have already been infected. Thus, our initial value a = 3124.

And an additional 9% will be infected per month. Therefore, our rate r will be 1 + 9% or 1.09.

Hence, our function is:

$\displaystyle f(x) = 3124(1.09)^x$

Then after nine months, the total amount of infected people will be f(9):

$\displaystyle f(9) = 3124(1.09)^{(9)}$

Use a calculator:

$\displaystyle f(9) \approx 6785$

About 6,785 people will be infected about nine months.

6 0

3 years ago

the circle below has center T. suppose that m UV = 138 degrees and that UW is tangent to the circle at U. find the following

alisha [4.7K]

Angle UTV is basically given: it's 138°.

Moreover, since UTV is isosceles, the other two angles have the same measure x. We thus have

$138+x+x=180 \iff 2x=42 \iff x=21$

So, TUV is 21°, and VUW is complementary, so it must be 69° so that they sum up to 90°

3 0

4 years ago

NEED HELP ASAP A survey was conducted with high school students in

Mekhanik [1.2K]

Question:

a. Twenty-three ninth graders and fifteen eleventh graders prefer math.

b. Fourteen eleventh graders prefer math and eight tenth graders prefer English.

c. Thirty-five twelfth graders prefer math and nine tenth graders prefer English.

d. Twenty-three ninth graders and thirty-five twelfth graders prefer math.

e. Eighteen tenth graders prefer English and fourteen eleventh graders prefer math.

Answer:

Therefore, the correct options are;

b. and d.

Step-by-step explanation:

Here we have a table with blank boxes and totals from which we can fill the boxes;

For the 12th graders, we have a total of 67 pupils with 32 preferring English, therefore the number of the 12th graders that prefer math is 67 - 32 = 35 pupils

Similarly for the 11th graders we have total pupils = 29 with 15 preferring English, therefore the number of the 11th graders that prefer math is 29 - 15 = 14 pupils

Also for the 10th graders we have total pupils = 26 with 18 preferring math, therefore the number of the 11th graders that prefer English is 26 - 18 = 8 pupils

Finally for the 9th graders, we have a total of 63 pupils with 40 preferring English, therefore the number of the 9th graders that prefer math is 63 - 40 = 23 pupils

From the above, the correct option is

7 0

3 years ago

Read 2 more answers

The orange juice to water ratio is 2:1 wich is equal to 3 liters.How much orange juice and water do you need to create 12 liters

ivann1987 [24]

(2:1) x 4
8:4 which is equal to 12 litres.

6 0

3 years ago

Choose all answers that apply.

Aleksandr [31]

Answer:

It should be C

Step-by-step explanation:

You want to cancel out the x variables

3 0

3 years ago