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IceJOKER [234]
2 years ago
11

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

<u>Mercury left after 188 days:</u>

  • 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

7 0
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

3 0
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:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

<u>Algebra I</u>

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

Step-by-step explanation:

<u>Step 1: Define</u>

Interval -1 ≤ x ≤ 3

a = -1, b = 3

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

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

<u>Step 2: Find Average</u>

  1. Substitute in variables [ARC]:                     \displaystyle \frac{f(3) - f(-1)}{3 + 1}
  2. Substitute:                                                   \displaystyle \frac{-4 - 4}{3 + 1}
  3. [Fraction] Subtract/Add:                             \displaystyle \frac{-8}{4}
  4. [Fraction] Divide:                                        \displaystyle -2
4 0
3 years ago
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