Which of the following is true about the age of rock layers and the age of the Earth? A. All rock layers are older than the Eart
1 answer:
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Answer:
Step-by-step explanation:
<h3>Question-1:</h3>so when <u>flash down</u><u> </u>occurs the rocket will be in the ground in other words the elevation(height) from ground level will be 0 therefore,
to figure out the time of flash down we can set h(t) to 0 by doing so we obtain:
to solve the equation can consider the quadratic formula given by
so let our a,b and c be -4.9,229 and 346 Thus substitute:
remove parentheses:
simplify square:
simplify multiplication:
simplify Substraction:
by simplifying we acquire:
since time can't be negative
hence,
at <u>4</u><u>8</u><u>.</u><u>2</u><u> </u>seconds splashdown occurs
<h3>Question-2:</h3>to figure out the maximum height we have to figure out the maximum Time first in that case the following formula can be considered
let a and b be -4.9 and 229 respectively thus substitute:
simplify which yields:
now plug in the maximum t to the function:
simplify:
hence,
about <u>3</u><u>0</u><u>2</u><u>1</u><u>.</u><u>6</u><u> </u>meters high above sea-level the rocket gets at its peak?
Check the picture below.
