2 years ago

I need help ASAP pls

Mathematics

1 answer:

DochEvi [55]2 years ago

3 0

Answer:

-38

Step-by-step explanation:

10 + 28 = 38 so to check it 10- (-38)=28

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Bob does 10 miles on his bike every day. If he continues to ride his bike at this pace, how many miles will he go in h days?

pychu [463]

Answer: in how many days?

Step-by-step explanation:

7 0

3 years ago

Can anyone help solve this?

Mashcka [7]

Answer:

12.2

Step-by-step explanation

The triangles are congruent, so the sides are as well. Add 6.1 and 6.1 and you will get 12.2

5 0

3 years ago

5,395<br> - 2,697<br> How do you solve?

sashaice [31]

Answer:

2698

Step-by-step explanation:First you take 1000 from 5000 and then distribute it to 395

3 0

3 years ago

Read 2 more answers

Help please and thank you

aksik [14]

Remember
$(a^b)^c=a^{bc}$
and
$\frac{x^a}{x^b}=x^{a-b}$

so

$\frac{(7^2)^5}{7^{-6}}=$
$\frac{7^{2*5}}{7^{-6}}=$
$\frac{7^{10}}{7^{-6}}=$
$7^{10-(-6)}=$
$7^{10+6}=$
$7^{16}$

the answer is D

5 0

3 years ago

Situation:A researcher in North America discoversa fossile that contains 65% of its originalamount of C-14..-ktN=NoeNo inital am

zheka24 [161]

SOLUTION

We have been given the equation of the decay as

$\begin{gathered} N=N_0e^{-kt} \\ where\text{ } \\ N_0=initial\text{ amount of C-14 at time t} \\ N=amount\text{ of C-14 at time t = 65\% of N}_0=0.65N_0 \\ k=0.0001 \\ t=time\text{ in years = ?} \end{gathered}$

So we are looking for the time

Plugging the values into the equation, we have

$\begin{gathered} N=N_0e^{-kt} \\ 0.65N_0=N_0e^{-0.0001t} \\ e^{-0.0001t}=\frac{0.65N_0}{N_0} \\ e^{-0.0001t}=0.65 \end{gathered}$

Taking Ln of both sides, we have

$\begin{gathered} ln(e^{-0.000t})=ln(0.65) \\ -0.0001t=ln(0.65) \\ t=\frac{ln(0.65)}{-0.0001} \\ t=4307.82916 \end{gathered}$

Hence the answer is 4308 to the nearest year

8 0

8 months ago