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Fantom [35]
3 years ago
5

Question 1(Multiple Choice Worth 5 points) (07.01 MC) The amount of radioactive uranium changes with time. The table below shows

the amount of radioactive uranium f(t) left after time t: t(hours) 0 0.5 1 f(t) 100 50 25 Which exponential function best represents the relationship between f(t) and t?
Mathematics
2 answers:
morpeh [17]3 years ago
7 0

the answer would be f(t) = 100(0.25)t

sertanlavr [38]3 years ago
6 0

This represents a half life equation - since as time increases, radioactivity decreases by half. If we take our exponential function

y = a(r)^t, r = 1/2 since as t increases, y halves. The initial amount of radiation is 100, so a = 100


Thus we get f(t) = 100(1/2)^t

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<img src="https://tex.z-dn.net/?f=%5Csf%2015%3D2x-9" id="TexFormula1" title="\sf 15=2x-9" alt="\sf 15=2x-9" align="absmiddle" cl
Genrish500 [490]

Answer:

x=12

Step by step explanation:

Step by step explanation:Add 9 to both sides :

15 = 2x - 9

15 + 9 = 2x - 9 + 9

Simplify:

24 = 2x

Divide both sides to get the result:

24 = 2x

24/2 = (2x)/2

Result:

x=12

\boxed{\sf Answered \: By\: Subhash}

\boxed{\sf Good\: luck \: for \: your \:assignment}

7 0
2 years ago
Find the volume and round to the nearest tenth as needed
monitta

Answer: 1962.4 cubic mm

Step-by-step explanation:

The volume of the larger cone is V=\frac{1}{3}(\pi)(10^{2})(20)=\frac{2000\pi}{3}

The volume of the smaller cone is V=\frac{1}{3}(\pi)(3^{2})(14)=42\pi.

So, the volume is \frac{2000\pi}{3}-42\pi \approx \boxed{1962.4}

3 0
2 years ago
Eight More than four times a Number is negative 20
gizmo_the_mogwai [7]

Answer:

If this is what I think it is then your answer is 4x + 8 = -20

3 0
2 years ago
Use the following equations to solve the problem.
Liono4ka [1.6K]
35 mph = 56 km/h

Final distance = 11.3 + 56 x 3
Final distance = 179.3 km

The second option is correct.
3 0
3 years ago
Read 2 more answers
What is the circumference of a circular park with a radius of 100 meters? (Round your answer to the nearest tenth.)
Scilla [17]
Radius = 100m
Circumference of a circle = 2πr
= 2 × π× 100
=628.31m
7 0
2 years ago
Read 2 more answers
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