![mazielynn84](/avatars/15062.jpg)
mazielynn84
15.12.2019 •
Mathematics
a glass-enclosed elevator at a sports arena moves upward from the ground floor at a constant speed of h = 9t.
at the same time the elevator starts to rise, a cannon on the arena floor shoots a souvenir mini-basketball into
the air at an initial velocity of 60 feet per second. the height of the mini-basketball (neglecting air resistance)
can be modeled by the equation h=-16t' + 60t. in both equations, h is height in feet and t is time in seconds.
find the time for the ball and the elevator to be at the same height again. if necessary, round your answer to
the nearest tenth of a second.
a. 1.7 seconds
c. 2.4 seconds
b. 3.2 seconds
d. 1.5 seconds
Solved
Show answers
More tips
- C Computers and Internet What is Web 2.0 and How Does it Work?...
- S Style and Beauty Is Photoepilation the Solution to Unwanted Hair Forever?...
- O Other What is a Disk Emulsifier and How Does it Work?...
- F Family and Home What does a newborn need?...
- F Family and Home Choosing the Right Car Seat for Your Child: Tips and Recommendations...
- F Food and Cooking How to Get Reconfirmation of Registration?...
- C Computers and Internet How to Get Rid of Spam in ICQ?...
- A Art and Culture Who Said The Less We Love a Woman, the More She Likes Us ?...
- F Family and Home How to Get Rid of Your Neighbors?...
- S Society and Politics How Could Nobody Know About the Dead Mountaineers?...
Answers on questions: Mathematics
- M Mathematics F(x)=x2-3 and g(x)=x+1 the composite function...
- M Mathematics The equation d = 2.5t + 4 gives the depth of the snow on the ground during a snowstorm. The variable t stands for the time that has passed since the start of the storm,...
- M Mathematics 9.3x 10^7 in standard notation...
- M Mathematics Solve the inequality 4x − 6 6x − 20. (5 points)...
- M Mathematics Caroline walks 912 inches per second. As unit rate...
- M Mathematics What is the expanded form of 5.629...
- M Mathematics Please help! This is the last question to my test!! Will give brainliest!...
- M Mathematics Please solve this system : x+y+z=-3 3y-z+\=4 2x-y-2z=-5...
- M Mathematics If x does not equal 16 then 2x+10 does not equal 42...
- M Mathematics The product of 120 and b is equal to 312 Write the sentence as an equation....
Ответ:
b. 3.2 seconds
Step-by-step explanation:
Given the 2 functions:
h = 9t
h= -16t² + 60t
When the height is the same for both objects:
9t = -16t² + 60t
0 = -16t² + 60t - 9t
0 = -16t² + 51t
0 = t(-16t + 51)
which has two solutions:
t = 0
or
-16t + 51 = 0
51 = 16t
t = 51/16 = 3.2
Ответ:
(39) in base 10 (decimal) is the same as (100111) in base 2 (binary).