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
Sati [7]
3 years ago
7

Researchers at the Centers for Disease Control and Prevention have been studying the decay pattern of a new virus with a decay r

ate of 19% per hour. They start with 300 viruses that they want to check on in the next 7 hours. How many viruses will they find in 7 hours? Round your answer to the nearest whole number
Mathematics
1 answer:
klemol [59]3 years ago
5 0

Answer:

After 7 hours will be 1.95489493x10^12 viruses

Step-by-step explanation:

If the virus spread with 19% per hour after one hour it will increase 57 and continue in the 300+((300*0.19)^7) form, we just need to caculate the form

You might be interested in
Negative eight minus seven? (-8-7)
Nutka1998 [239]

Answer:

-15 is the answer of this

Step-by-step explanation:

Rules in Algebra

5 0
2 years ago
Read 2 more answers
Charlie runs 11 miles in 95 minutes. How many miles does he run per minute?
Viktor [21]

Answer: 5000000000

Step-by-step explanation: i just know

8 0
2 years ago
Read 2 more answers
HELP ME PLEASE!! ASAP IF YOU CAN IM STUCK ON THIS QUESTION
Pani-rosa [81]

Answer:

5x=15

Step-by-step explanation:

Product means multiplication, and 5x=15 is the only one doing multiplication

3 0
2 years ago
Please answer the following questions​
laila [671]

Answer:

4a) 110 square centimetres

4b) 127 square centimetres

6) 292 square centimetres

8) 800 tiles

Step-by-step explanation:

4. We need to find the area of the large rectangle and then deduct the area of the unshaded part:

a) The large rectangle has dimensions 12 cm by 15 cm. Its area is:

A = 12 * 15 = 180 square centimetres

The unshaded part has a length of 15 - (3 + 2) cm i.e. 10 cm and a width of 7 cm. Its area is:

a = 10 * 7 = 70 square centimetres

Therefore, the area of the shaded part is:

A - a = 180  - 70 = 110 square centimetres

b) The large rectangle has dimensions 13 cm by 11 cm. Its area is:

A = 13 * 11 = 143 square centimetres

The unshaded part has dimensions 8 cm by 2 cm. Its area is:

a = 8 * 2 = 16 square centimetres

Therefore, the area of the shaded part is:

A - a = 143 - 16 = 127 square centimetres

6. The background area of the space not covered by the photograph is the area of the frame minus the area of the photograph.

The frame has dimensions 24 cm by 18 cm. Therefore, its area is:

A = 24 * 18 = 432 square centimetres

The photograph has dimensions 14 cm by 10 cm. Therefore, its area is:

a = 14 * 10 = 140 square centimetres

Therefore, the background area of the space not covered by the photograph is:

A - a = 432 - 140 = 292 square centimetres

8) The floor has dimensions 8 m by 4 m. The area of the floor is:

A = 8 * 4 = 32 square centimetres

Each square tile has dimensions 20 cm by 20 cm. In metres, that is 0.2 m by 0.2 m. The area of each tile is:

a = 0.2 * 0.2 = 0.04 square metres

The number of tiles that are needed is the area of the floor divided by the area of each tile:

A / a = 32 / 0.04 = 800 tiles

4 0
3 years ago
5+2 root 3 / 7+4 root 3 =a-6root3
STALIN [3.7K]

Answer:

<h2>a = 11</h2>

Step-by-step explanation:

\dfrac{5+2\sqrt3}{7+4\sqrt3}\qquad\text{use}\ (a+b)(a-b)=a^2-b^2\\\\=\dfrac{5+2\sqrt3}{7+4\sqrt3}\cdot\dfrac{7-4\sqrt3}{7-4\sqrt3}=\dfrac{(5+2\sqrt3)(7-4\sqrt3)}{7^2-(4\sqrt3)^2}\qquad\text{use FOIL}\\\\=\dfrac{(5)(7)+(5)(-4\sqrt3)+(2\sqrt3)(7)+(2\sqrt3)(-4\sqrt3)}{49-4^2(\sqrt3)^2}\\\\=\dfrac{35-20\sqrt3+14\sqrt3-8(3)}{49-(16)(3)}=\dfrac{(35-24)+(-20\sqrt3+14\sqrt3)}{49-48}\\\\=\dfrac{11-6\sqrt3}{1}=11-6\sqrt3

8 0
3 years ago
Other questions:
  • What is 2100 as a fraction
    10·2 answers
  • Suppose that one person in 10,000 people has a rare genetic disease. There is an excellent test for the disease; 98.8% of the pe
    12·1 answer
  • 7. Ravmond looked out the window of his math classroom at the teacher's parking lot and saw a total of 13
    12·1 answer
  • Is the following sentence a statement or not a statement? He is six years old. It is a statement. It is not a statement. cannot
    12·2 answers
  • Please help me with this​
    6·1 answer
  • Which series is convergent? Check all that apply.
    5·2 answers
  • <img src="https://tex.z-dn.net/?f=2x%5E%7B2%7D%20%2B5x%2B2" id="TexFormula1" title="2x^{2} +5x+2" alt="2x^{2} +5x+2" align="absm
    7·1 answer
  • WHOEVER ANSWERS THIS CORRECTLY I'LL GIVE BRAINLIEST!!!!!!!!!!!!
    9·2 answers
  • The point V is plotted on the coordinate grid below. Plot the point V′, the reflection of
    9·1 answer
  • Does anyone know the answer to this ??? I got the first part of it, help with the second part pls !!!
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!