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2 years ago

I don't understand why m

Mathematics

2 answers:

alekssr [168]2 years ago

5 0

Answer:

Step-by-step explanation:

When is says m< It is really said “m” angle___ it has nothing to do with math really

OLga [1]2 years ago

3 0

please explain what question you are talking about since there is 6 questions on the paper.

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zzz [600]

Answer:1 computer : 8 students

Step-by-step explanation:

if there are 9 computers it would originally be 9 : 72 but that can be reduced since 9 is a factor of 72.

8 0

3 years ago

Read 2 more answers

Answer the question as soon as possible

expeople1 [14]

Answer:

D. Distributive

Step-by-step explanation:

a(b + c) = ab + ac - Distributive property

Correct choice is D

6 0

3 years ago

James earned a total of $900 this week. this total was $20 less than four times the amount he earned last week. how much money d

Vladimir [108]

<span>4x – 20 = 900
4x = 900+20
4x = 920
x = 920/4
x = 230
he earned $230
</span>

7 0

3 years ago

Newton's law of cooling is:

Mnenie [13.5K]

Answer:

$t = \frac{ln(\frac{21}{59})}{-0.15}=6.887 hr$

So it would takes approximately 6.9 hours to reach 32 F.

Step-by-step explanation:

For this case we have the following differential equationÑ

$\frac{du}{dt}= -k (u-T)$

We can reorder the expression like this:

$\frac{du}{u-T} = -k dt$

We can use the substitution $w = u-T$ and $dw =du$ so then we have:

$\frac{dw}{w} =-k dt$

IF we integrate both sides we got:

$ln |w| = -kt +C$

If we apply exponential in both sides we got:

$w = e^{-kt} *e^c$

And if we replace w = u-T we got:

$u(t)= T + C_1 e^{-kt}$

We can also express the solution in the following terms:

$u(t) = (T_i -T_{amb}) e^{kt} +T_{amb}$

For this case we know that $k =-0.15 hr$ since w ehave a cooloing, $T_{i}= 70 F, T_{amb}=11F$ , we have this model:

$u(t) = (70-11) e^{-0.15t} +11$

And if we want that the temperature would be 32F we can solve for t like this:

$32 = 59 e^{-0.15 t} +11$

$21=59 e^{-0.15 t}$

$\frac{21}{59} = e^{-0.15 t}$

If we apply natural logs on both sides we got:

$ln (\frac{21}{59}) =-0.15 t$

$t = \frac{ln(\frac{21}{59})}{-0.15}=6.887 hr$

So it would takes approximately 6.9 hours to reach 32 F.

7 0

3 years ago

Bcc Medical Radiography program had 139 graduates. There were 25 more females than males. How many females and males graduated?

NISA [10]

F=m+25

m+f=139, using f from above we have:

m+(m+25)=139

2m+25=139

2m=114

m=57, and since f=m+25

f=82

So there are 57 males and 82 females.

8 0

3 years ago