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xxTIMURxx [149]
3 years ago
6

find two numbers that round to 15.5 when rounded to the nearest tenth. besides 15.04 15.55 15.508 15.445 15.0 15.49

Mathematics
1 answer:
Kitty [74]3 years ago
4 0
Two other numbers are 15.48 and 15.52
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What is the answer to 4x+12=24
mr_godi [17]

Answer:x=3

Step-by-step explanation:

You are solving for x

Subtract 12

4x=12

x=3

Hope this helped!

6 0
9 months ago
The doubling period of a bacterial population is 20 20 minutes. At time t = 100 t=100 minutes, the bacterial population was 9000
Nuetrik [128]

Answer:

The initial population was 2810

The bacterial population after 5 hours will be 92335548

Step-by-step explanation:

The bacterial population growth formula is:

P = P_0 \times e^{rt}

where P is the population after time t, P_0 is the starting population, i.e. when t = 0, r is the rate of growth in % and t is time in hours

Data: The doubling period of a bacterial population is 20 minutes (1/3 hour). Replacing this information in the formula we get:

2 P_0 = P_0 \times e^{r 1/3}

2 = e^{r \; 1/3}

ln 2 = r \; 1/3

ln 2 \times 3 = r

2.08 \% = r

Data: At time t = 100 minutes (5/3 hours), the bacterial population was 90000. Replacing this information in the formula we get:

90000 = P_0 \times e^{2.08 \; 5/3}

\frac{9000}{e^{2.08 \; 5/3}} = P_0

2810 = P_0

Data: the initial population got above and t = 5 hours. Replacing this information in the formula we get:

P = 2810 \times e^{2.08 \; 5}

P = 92335548

3 0
3 years ago
CAN SOMEONE HELP ME WITH THIS????????????????
Lerok [7]

\text{Hello there!}\\\\\text{We're trying to find the area of the shape}\\\text{We can do this by finding the area for the different shapes, then adding}\\\text{them together}\\\\\text{We can find the area of the rectangle,} \,\,84\cdot66=5,544\\\\\text{To find the area of the half circle, we would use the equation:}\,\,A=\frac{3.14r^2}{2}\\\\\text{The radius is half of the diameter, therefore it is 33. Plug 33 in r}\\\\A=\frac{3.14(33)^2}{2}\\\\\text{Solve:}\\\\A=\frac{3.14(33)^2}{2}\\

A=\frac{3.14(1089)}{2}\\\\A=\frac{3419.46}{2}\\\\\text{Divide by 2}\\\\A=1709.73\\\\\text{Since there's two half circles, we would add 1709.73 twice}\\\\\text{Add all the areas together}\\\\1709.73+1709.73+5,544=8963.46\\\\\large\boxed{\text{Area:}\,\,8963.46\,\,\text{m}^2}}

4 0
3 years ago
Solve the system of equations and choose the correct ordered pair. 
chubhunter [2.5K]
Multiply first equation by 8, 
24x + 40y = 352
Multiply second equation by 3, 
24x - 21y = -75

Now, subtract second from 1st, 
61y = 427
y = 427/61
y = 7

Substitute it in very first equation, 
3x + 5(7) = 44
3x = 44 - 35
x = 9 / 3
x =3

In short, Your Answer would be Option D) (3, 7)

Hope this helps!
7 0
3 years ago
In the number 3.333, the value of the digit in the hundredths place is ___ times as much as the digit in the thousandths place.
marysya [2.9K]
Hundredth place = 3.33
Thousandth place = 3.333

It's 10 times as 100 x 10 = 1000
6 0
3 years ago
Read 2 more answers
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