Mathematics, 16.11.2019 03:31 johnisawesome999
Aball is thrown from an initial height of 1 meter with an initial upward velocity of 15m/s. the ball's height h (in meters) after t seconds is given by the following.
h=1+15t-5t^2
find all values of t for which the ball's height is 6 meters. round your answer(s) to the nearest hundredth.
Answers: 1
![\bf t=\cfrac{-(-15)\pm\sqrt{(-15)^2-4(5)(5)}}{2(5)}\implies t=\cfrac{15\pm\sqrt{225-100}}{10} \\\\\\ t=\cfrac{15\pm\sqrt{125}}{10}\implies t=\cfrac{15\pm\sqrt{5^2 \cdot 5}}{10}\implies t=\cfrac{\stackrel{3}{~~\begin{matrix} 15 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~}\pm ~~\begin{matrix} 5 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~\sqrt{5}}{\underset{2}{~~\begin{matrix} 10 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~}}](/tpl/images/0376/9557/01dad.png)
Another question on Mathematics
Mathematics, 21.06.2019 14:10
Students are given 3 minutes for each multiple-choice question and 5 minutes for each free-response question on a test. there are 15 questions on the test, and students are given 51 minutes to take it.how many multiple-choice questions are on the test?
Answers: 1
Mathematics, 21.06.2019 21:00
The? half-life of a radioactive substance is 20 years. if you start with some amount of this? substance, what fraction will remain in 120 ? years
Answers: 1
Mathematics, 21.06.2019 21:00
Two cars which are 40 miles apart start moving simultaneously in the same direction with constant speeds. if the speed of the car which is behind is 56 mph and the speed of the other car is 48 mph, how many hours will it take for the car which is behind to catch up the car ahead of it?
Answers: 2
Mathematics, 21.06.2019 22:30
My hour hand points between the 8 and the 9 in 35 minutes it will be the next hour. what time is it ?
Answers: 2
You know the right answer?
Aball is thrown from an initial height of 1 meter with an initial upward velocity of 15m/s. the ball...
Questions
Mathematics, 25.01.2021 17:30
Mathematics, 25.01.2021 17:30
Mathematics, 25.01.2021 17:30
English, 25.01.2021 17:30
Arts, 25.01.2021 17:30
Mathematics, 25.01.2021 17:30
Biology, 25.01.2021 17:30
Physics, 25.01.2021 17:30
Mathematics, 25.01.2021 17:30
English, 25.01.2021 17:30
Computers and Technology, 25.01.2021 17:30
