Answer:
Option 1 and option 5.
Step-by-step explanation:
The given graph is a downward parabola. It means the value of function increases and after reaching its maximum point the value of function decreases.
Scenario 1 : The height of a stone shot by a catapult reaches a maximum height and then falls on the ground.
The graph of this scenario is a downward parabola. Therefore option 1 is correct.
Scenario 2 : The speed of a car increases constantly by 10 miles per hour.
The graph of this scenario is a straight line with slope 10. Therefore option 2 is incorrect.
Scenario 3 : The radioactivity of a substance decreases by 10% every year.
The graph of this scenario is an decreasing curve which represents an exponential function. Therefore option 3 is incorrect.
Scenario 4 : The amount of money in an account decreases for a few months and then increases.
The graph of this scenario is a upward parabola. Therefore option 4 is incorrect.
Scenario 5 : The sale of product increases at first and then decreases.
The graph of this scenario is a downward parabola. Therefore option 5 is correct.
Therefore, the correct options are 1 and 5.
Answer:
Are you asking how the answer became 16.1?
Step-by-step explanation:
Well the squiggly lines indicate that its an approximation so use a scientific calculator if you have one or use an online scientific calculator and plug in 12sin89/sin48. Your answer should be 16.145 rounded to 16.1
Divide first.
Multiply
Subtract
Answer:x=10/3
Step-by-step explanation:
1. C) 40k + 40l (Multiply 40 by each of the factors in the parentheses and show as an addition expression.)
2. C) -4 (Divide the two numbers.)
3.D) -3
