a scientist has 800 bacteria. with the use of antibiotics half of them die every 2 hours. how may are there after 16 hours

Mathematics

2 answers:

Shalnov [3]2 years ago

8 0

This is what i got in the caculator 6400 if not im so so sory

denis23 [38]2 years ago

5 0

After 16 hours , 3200 bacteria

because in 2 hours kills 400 right so

in 16 hours 3200 will be killed

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A plane flies at a steady rate of 40 mph while a second plane flies at a steady rate of 100 mph. The planes are 200 miles apart

Brums [2.3K]

Answer:

$1\ \text{hour}\ 25\ \text{minutes and }12\ \text{seconds}$

Step-by-step explanation:

The combined distance that both planes will cover is 200 miles

Time taken by both planes will be the same (t)

$\text{Distance}=\text{Speed}\times \text{Time}$

So, the combined distance is

$40t+100t=200\\\Rightarrow 140t=200\\\Rightarrow t=\dfrac{200}{140}\\\Rightarrow t=1.42\ \text{hours}=1\ \text{hour}\ 25\ \text{minutes and }12\ \text{seconds}$

They will meet in $1\ \text{hour}\ 25\ \text{minutes and }12\ \text{seconds}$ .

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2 years ago

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Sergeu [11.5K]

I got B and D, sorry if my answers are wrong!!

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A parking garage has 500 parking spaces. One morning 330 parking spots were filled. What percent of the parking spaces were fill

blondinia [14]

Hey there! :D

So, what we need to do is make a fraction that has a denominator of 100. This is the simplest route to take.

330/500

If you took one zero away from each side, you will get an equivalent fraction:

33/50

Multiply both side by 2 to get to 100.

33*2=66 50*2=100

66/100

So, 66% percent ornament the parking lots were filled.

I hope this helps!
~kaikers

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1. Find the inverse of the one-to-one function f(x)= 6x-7 / 5

Elenna [48]

Rewrite it as y=6x-7/5

Flip the x and y
x=6y-7/5

Solve
5x=6y-7
5x+7=6y
5/6x+7/6=y

f^-1(x)=5/6x+7/6

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Are these factors equivalent or nonequivalent?

dusya [7]

I'm pretty sure the above fractions are equivalent because if you reduce 5s/15t then it equals s/3t.

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