Answer:
Step-by-step explanation:
- Total number of plants = 15
- Total cost = $96
- Cost of pink flowering plant = $8
- Cost of purple flowering plant = $5
<u>Let x and y be the number of plants bought. Then we have equations:</u>
- 8x + 5y = 96
- x + y = 15 ⇒ y = 15 - x
<u>Substituting y in the first equation:</u>
- 8x + 5y = 96
- 8x + 5(15 - x) = 96
- 8x + 75 - 5x = 96
- 3x = 96 - 75
- 3x = 21
- x = 7
Correct option is the second one
Answer:
10.75%
Step-by-step explanation:
Given that :
Population of orcas in 2018 = 465
Population in 2020 = 515
The per capita growth rate acn be calculated using the relation:
C
[(Population change / initial population) * 100]
Population change = population (2020 - 2018) = (515 - 465) = 50
[(50 / 465) * 100]
(0.1075268 * 100) %
10.7526%
= 10.75%
Answer:
8 over 35 or Decimal Form: 0.228571
Step-by-step explanation:
Answer:
There will be 22.5 grams left after 32 hours.
Step-by-step explanation:
A half-life is how long it takes for half of the amount to go away. In this case, we see that we have two half-life periods worth, which you can determine by dividing the total time by the half-life time.
32hrs/8hrs = 4 half lives.
Now we can raise 1/2 to the power of how many half lives we have (2). Then we multiply that by the amount in the sample.
(1/2)^4 * 360
1/16 * 360
22.5 grams
And this is an exponential function.
hope this helps you with the question
