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3 years ago

PLS HELP I NEED AN ANSWER

Mathematics

1 answer:

meriva3 years ago

8 0

Answer:

Step-by-step explanation:

None of the other answers make sense, so just by process of elimination it should be B.

Good luck on your assignment!

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jill traveled to the ferry office and back. the trip there took 5 hours and the trip back took 4 hours. she averaged 65 mph on t

antoniya [11.8K]

We know from physics class that the formula for distance of a linear motion is given as:

d = v t

Where,

d = distance travelled

v = average velocity

t = time it took to reach the destination

Since the distance going to the office and back is just similar, therefore we can simply equate the two:

v1 t1 = v2 t2

Where 1 signifies going to the office and 2 signifies going back from the office. Therefore this yields to:

v1 * 5 hours = 65 mph * 4 hours

v1 = 52 mph

<span>Answer: The average speed going to the office is 52 mph.</span>

4 0

3 years ago

Pls solve correct!!<br> Whoever gets it right gets brainlist!!<br> I NEED THIS ANSWER NOW PLS!!

Reika [66]

I think it would be 88 square inches

5 0

3 years ago

Write an exponential function to represent a situation in which the initial value is 175 and the rate of decay is 20%

AleksAgata [21]

Answer:

Step-by-step explanation:

F(X)=(1/5)^T/175

6 0

3 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

If u answer this question i will give you 100 points i swear

tamaranim1 [39]

Answer: point W

Step-by-step explanation:

5 0

3 years ago