If s = (2 + 3t)(5t - 4), find ds/dt when t = 4/5 secs
...If s = (2 + 3t)(5t - 4), find ds/dt when t = 4/5 secs
0 units per sec
15 units per sec
22 unit per sec
26 units per sec
Correct answer is C
x = (2+3t)(5t-4)
Let u = 2+3t ∴du/dt = 3
and v = 5t-4 ∴dv/dt = 5
dx/dt = Vdu/dt + Udv/dt
= (5t-4)3 + (2+3t)5
= 15t - 12 + 10 + 15t
= 30t - 2
= 30x4/5 - 2
= 24 - 2
= 22
A hunter 1.6 m tall, views a bird on top of a tree at an angle of 45°. if the distance between t...
A and B are two sets. The number of elements in A∪B is 49, the number in A is 22 and number in B...
If 27x = 9y. Find the value of xy...
In the diagram PQRS is a circle, |PT| = |QT| and ∠QPT = 70o what is the size of ∠PRS?...
If t1 = √(4π2g), what is the value of g when I = 4.5; t = 5 secs...
Find the area bounded by the curves y = 4 - x2 and y = 2x + 1 ...