2 years ago

Plz help with as many as u can

Mathematics

1 answer:

nydimaria [60]2 years ago

8 0

This is the right answer

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You have 2,112 grams of a radioactive kind of mercury. How much will be left after 188 days if it's half-life is 47 days?

Anastasy [175]

Answer:

132 g

Step-by-step explanation:

Initial amount = 2112 g
Time = 188 days
Half-life = 47 days

188 days / 47 days = 4 periods

Mercury left after 188 days:

2112 * (1/2)^4 =
2112* 1/16 =
2112/16 =
132 g

4 0

3 years ago

. Find the number of doughnuts for the workers if there are typically 3

Elena-2011 [213]

Answer:

25 doughnuts

Step-by-step explanation:

for 15 workers,

the numbers of doughnuts =

5 doughnuts/3 workers × 15 workers

= 75/3 doughnuts

= 25 doughnuts

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2 years ago

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A piano teacher gives lessons that are each Three-fourths hour long. How many piano lessons can the teacher fit into a 12-hour w

tino4ka555 [31]

Answer:

16 lessons

Step-by-step explanation:

12 divided by .75 = 16

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3 years ago

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Can someone help me write the expression

erica [24]

Answer: 4 1/10g^5+5 1/4

Step-by-step explanation:

8 0

3 years ago

The function y = f (x) is graphed below. What is the average rate of change of the function f(x) on the interval - 1 ≤ x ≤ 3?

jonny [76]

Answer:

$\displaystyle -2$

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Average Rate of Change: $\displaystyle \frac{f(b) - f(a)}{b - a}$

Step-by-step explanation:

Step 1: Define

Interval -1 ≤ x ≤ 3

a = -1, b = 3

f(a) = f(-1) = 4

f(b) = f(3) = -4

Step 2: Find Average

Substitute in variables [ARC]: $\displaystyle \frac{f(3) - f(-1)}{3 + 1}$
Substitute: $\displaystyle \frac{-4 - 4}{3 + 1}$
[Fraction] Subtract/Add: $\displaystyle \frac{-8}{4}$
[Fraction] Divide: $\displaystyle -2$

4 0

3 years ago