Ask question

Ask question

All categories

2 years ago

5

Please help!!!!!

1 answer:

pentagon [3]2 years ago

7 0

Hold on I’ll answer it

You might be interested in

If the answer is 5 why isn't 5 an option?

jonny [76]

Answer:

because they made a mistake

8 0

2 years ago

A detective finds a victim of murder at 9 am. At that time, the temperature of the body is 90.3 degrees F. One hour later, the b

LekaFEV [45]

Answer:

Step-by-step explanation:

Given

at 9 am temperature of the body is $90.3^{\circ}F$

1 hr later temperature $89^{\circ}F$

Temperature of room $T=68^{\circ}F$

According to newtons law

$\frac{\mathrm{d} T}{\mathrm{d} t}=-k\left ( T-T_{room}\right )$

$\frac{\mathrm{d} T}{\mathrm{d} t}=-k\left ( T-68\right )$

$\frac{dT}{T-68}=-kdt$

Integrating

$=\int \frac{dT}{T-68}=-kdt$

$\ln |T-68|=-kt+c$

$T-68=Ae^{-kt}$

Now at 9 am i.e. t=0,

$90.3=A+68$

$A=22.3$

At 10 am i.e. t=1 hr T=89

$89-68=22.3e^{-k}$

$e^{-k}=21$

$k=0.06006$

Temperature of Normal human body is $T=98.6 ^{\circ}F$

$98.6-68=e^{-0.06006t}$

$30.6=e^{-0.06006t}$

Taking log both sides

$t=-5.27$

i.e. 5 hr and 16.2 min

i.e. victim murdered at 3 am and 43.8 min

7 0

3 years ago

HELP ASAP!!! (The problem is on a screenshot)

Darina [25.2K]

The correct answers are A, D, and E.

7 0

2 years ago

Lefties The author had difficulty finding the percentage of people who write with their left hand. If we want to estimate that p

Zigmanuir [339]

I am a lefty, and I know for a fact that 40% off the population write with there left

8 0

3 years ago

A number x, rounded to 1 decimal place is 12.3 write down the error interval for x

icang [17]

We know that
<span>A number x, rounded to 1 decimal place is 12.3
</span><span>so
x>=12.25
and
x < 12.35

</span><span>the error interval for x is the interval [12.25,12.35)
</span>
the answer is
[12.25,12.35)

3 0

3 years ago