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Zigmanuir [339]
3 years ago
12

Tell if each equation represents exponential growth, exponential decay or neither.

Mathematics
1 answer:
scoray [572]3 years ago
3 0

Answer:

Exponential growth A, B;

exponential decay C, E;

neither D.

Step-by-step explanation:

The function y=a\cdot b^x

  • represents exponential growth when b>1;
  • represents exponential decay when 0

A. The equation f(t)=\dfrac{2}{3}\cdot \left(\dfrac{7}{3}\right)^t represents exponential growth, because \dfrac{7}{3}>1.

B. The equation P=22\cdot \left(1.76\right)^x represents exponential growth, because 1.76>1.

C. The equation V=\dfrac{1}{3}\cdot \left(0.45\right)^x represents exponential decay, because 0

D. The equation W=3.2\cdot (x) represents neither exponential growth nor exponential decay, because this function is linear.

E. The equation g(x)=4.2\cdot \left(\dfrac{1}{3}\right)^x represents exponential decay, because 0

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3 times the sum of y and 9 <br><br> in algebraic expression please help me out!!
Ray Of Light [21]

3(y+9)

plz plz mark brainliest if it helps

3 0
3 years ago
Please help
poizon [28]

Answer:

D

Step-by-step explanation:

4 people = 15 days

1 people = 15/4 = 3.75

so, 6 people = 3.75 × 6

= 22.5

7 0
3 years ago
Rina is making a nut mixture to sell at the local farmers' market. She mixes 6 pounds of pecans with a nut mixture that is 70% p
Marat540 [252]
So the best way to do these is concentration1 (%) × volume1 = concentration2 × volume2
Or C1V1 + C2V2 = C3V3, where C1 = 100% (bc ALL pecans), V1 = 6 lbs, C2 = 70%, C3 = 82%:
100%×6 + 70%×v2 = 82%×(6+v2)
100%=1.00, 70%=.7, 82%=.82
note: if none is poured out then v3 = v1+v2
6 + .7v2 = .82 (6+v2)
6 + .7v2 = 4.92 + .82v2
6 + .7v2 -.7v2 = 4.92 + .82v2 -.7v2
6 = 4.92 + .12v2
6-4.92 = 4.92-4.92 + .12v2
1.08 = .12v2
.12v2/.12 = 1.08/.12
v2 = 9 lbs
that's only v2!!!

For the final poundage, we need v3:

v3 = 6 + v2 = 6 + 9 = 15 lbs
7 0
3 years ago
The diameter of a sphere is 4 centimeters. Which represents the volume of the sphere?
frosja888 [35]

Answer:

256π/3 cm³

Step-by-step explanation:

d = 2r => r = d/2 = 4cm/2 = 2 cm

V(sphere) = 4π·r³/3

= 4π·64/3 cm³

= 256π/3 cm³

7 0
3 years ago
Look at the image below
boyakko [2]

Answer:

201.1 km²

Step-by-step explanation:

Surface area of the figure,

4πr²

= 4×π×4²

= 64π

= 201.1 km² (rounded to the nearest tenth)

4 0
3 years ago
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