Answer:
6 seconds
Step-by-step explanation:
<u><em>The question in English is</em></u>
An object is thrown from a platform.
Its height (in meters), x seconds after launch, is modeled by:
h(x)=-5x^2+20x+60
How many seconds after the launch does the object reach the ground?
Let
x ----> the time in seconds
h(x) ---> the height of the object
we have

we know that
When the object hit the ground the height is equal to zero
so
For h(x)=0
we have

The formula to solve a quadratic equation of the form
is equal to
in this problem we have

so
substitute in the formula
The solution is x=6 sec
The he object reach the ground at x=6 seconds
Using a ratio table to determine the number of miles that Ronney could bike in 6 days as <u>285 miles</u> is as follows:
<h3>Ratio Table:</h3>
Day Miles Biked
Day One 47.5
Day Two 95.0
Day Three 142.5
Day Four 190.0
Day Five 237.5
Day Six 285.0
<h3>What is a ratio table?</h3>
A ratio table is a structured list of equivalent (equal value) ratios that explain the relationship between the ratios and the numbers.
<h3>Data and Calculations:</h3>
Day Miles Biked
Day One 47.5 (190/4)
Day Two 95.0 (190/4 x 2)
Day Three 142.5 (190/4 x 3)
Day Four 190.0 (190/4 x 4)
Day Five 237.5 (190/4 x 5)
Day Six 285.0 (190/4 x 6)
Thus, in six days, Ronney biked <u>285 miles</u> based on the ratio table.
Learn more about ratio tables at brainly.com/question/27817533
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A random variable is UNIFORMLY DISTRIBUTED whenever the probability is proportional to the interval's length.
No, when you have a zero in that space you don't necessarily need an addendum unless it helps you.
Answer:
4x-4+3
Step-by-step explanation: