Ask question

Ask question

All categories

3 years ago

12

seans mom asks how long his homework will take. He tells her that he needs to read for 25 minutes and also do so math problems t

hat will take M minutes altogether whose whom work will take H minutes

1 answer:

belka [17]3 years ago

7 0

M+25=h

M is math minutes and h is total

25 + m = h
OR
m + 25 = h

either way works cause it is an addition equation! Good luck!

You might be interested in

Simply using order of operations <br> 20 - (4*2) ÷ (5-3)

Keith_Richards [23]

The answer is 6 because you have to first find the answer for (4*2) and (5-3)

3 0

3 years ago

Read 2 more answers

Determine the volume of the space in the tank that still needs to be filled with water if the water is ⅓ ft. Deep

vlada-n [284]

Answer:

11 1/9 ft^3

Step-by-step explanation:

find the complete question in the attached image

volume of the tank = length x width x height

2 x 5 x 1 2/3

2 x 5 x 5/3 = 50/3 = 16 2/3 ft^3

If the tank is 1/3 filled with water, the volume that needs to be filled with water is 1 - 1/3 = 2/3

volume that needs to be filled with water = 2/3 x volume of the tank

2/3 x 50/3 = 11 1/9 ft^3

4 0

3 years ago

A patient is given a 100-milligram dosage of a drug that decays exponentially at a rate of 11% per hour. The doctor wants to kno

I am Lyosha [343]

Answer:

This is an example of exponential decay (somewhat similar to half-life).

If it decays at 11% per hour we can calculate its half-life by this formula:

half life = [ time • ln (2) ] ÷ ln (beginning amount ÷ ending amount)

where "ln" means natural log

half life =[ 1 hour * .69315] / ln (100 / 89)

half life =[.69315] / ln (1.1235955056)

half life =[.69315] / 0.11653381624

half life = 5.9481 hours

We need "lambda" "λ" (the decay constant) which equals

λ = ln(2) / half-life = .693147 / 5.9481 = 0.1165325062

Now we need a formula for the time required:

time = ln (Nt ÷ N0) ÷ -λ where No = beginning amount (100 milligrams) Nt = ending amount (15 milligrams)

time = ln (15 ÷ 100) ÷ -0.1165325062

time = ln (.15) / -0.1165325062

time = -1.8971199849 / -0.1165325062

time = 16.2797492885 hours

Source: https://www.1728.org/halflif2.htm

Step-by-step explanation:

4 0

3 years ago

A single die is rolled twice. Find the probability of getting a 2 the first time and a 6 the second time. Express the probabilit

myrzilka [38]

it would be 2/6 bc, one die, rolled twice, and landing on a 2 the first time and 6 the second time, is actually a 2/6 chance, you have 6 numbers, one die, two chances.

3 0

3 years ago

Read 2 more answers

Fynjy0 [20]

Answer:

t=18 years

Step-by-step explanation:

A year has two semesters, then

n = 2v(t)=p(1+r/2)2t

3875.79 = 1900∗(1+(0.04/2))^2t

2.0398895 = (1+0.042)^2t

Apply natural logarithm on both sides

ln(2.0398895) = ln[(1+0.042)^2t]

Then simplify,

0.712896 = 2t∗ln(1.02)

t = 0.712896 / (2∗ln(1.02))

t=18 years

7 0

3 years ago

Read 2 more answers