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3 years ago

Which function is an example of exponential decay?

Mathematics

1 answer:

malfutka [58]3 years ago

5 0

<span>A.) y = 0.3(2)x
These are exponential decay</span>

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What is the mass of a solid ball of iron with a radius equal to 18 cm if it is known that the density of iron is 7800 kg/m

Shtirlitz [24]

Answer:

60.6528 kg

Step-by-step explanation:

Assuming the solid ball of iron is a sphere with a radius of 18 cm (or 0.18 m), we can compute the volume of the sphere:

$V=\frac{4}{3}\pi r^3\\\\V=\frac{4}{3}\pi (\frac{18}{100})^3\\\\V=\frac{4}{3}\pi (0.005832)\\\\V=0.007776$

Therefore, the volume of the solid ball is 0.007776 m³

Since we know that density is mass/volume, then we can find the mass of the iron:

$\rho=\frac{mass}{volume}\\ \\7800\: kg/m^3=\frac{mass}{0.007776\: m^3}\\\\mass=60.6528\:kg$

Thus, the mass of the solid ball of iron is 60.6528 kg

8 0

2 years ago

A circle has an area of 36pi square inches. Find the radius

zmey [24]

<span>circle area = </span>πr² ⇒

$\pi r^2=36 \pi \\ r^2= \frac{36 \pi }{ \pi } \\ r^2=36 \\ r= \sqrt{36} \\ r=6 \ in$

6 0

3 years ago

Solve each expression 2n^2+3n-2

Gnom [1K]

Simple, solve straight across, its either 4n or 2n

5 0

3 years ago

Read 2 more answers

LA BASE DE UN RECTANGULO ES 8 M MAYOR QUE LA ALTURA, EL AREA MIDE 65 METROS CUADRADOS ¿CUANTO MIDEN LA BASE Y ALTURA?

sp2606 [1]

Answer:

23 m and 15 m

Step-by-step explanation:

THE BASE OF A RECTANGLE IS 8 M GREATER THAN THE HEIGHT, THE AREA MEASURES 65 SQUARE METERS HOW MUCH DO THE BASE AND HEIGHT MEASURE?

Let the height of the rectangle is h.

Base = 8+h

Area of the rectangle, A = 65 m²

We need to find the base and height of the rectangle. The area of a rectangle is given by :

A = bh

So,

$65=(8+h)\times h\\\\65=8h+h^2\\\\h^2+8h-65=0\\\\(h-5)(h+13)=0\\\\h=5\ m\ \text{and}\ x=-13\ m$

Neglecting negative value, h = 15 m

Base = 8+15 = 23 m

So, the base and height of the rectangle is 23 m and 15 m respectively.

4 0

3 years ago

Krystal is comparing two internet service plans. Plan A costs $34.99 per month and plan B costs $ $134.97 every three months. If

Minchanka [31]

Answer:

If Krystal goes with plan A, She will save 120 dollars.

Step-by-step explanation:

Plan A costs 419.88 dollars per year (34.99*12= 419.88)

Plan B costs 539.88 dollars per year (134.97 * 4 = 539.88)

(Sounds desperate but can I get the Brainliest?)

7 0

3 years ago