Answer:
Speed = 13.0m/s
Step-by-step explanation:
Given that velocity, v = (ai ± bj)m/s.
Because speed is scalar and has only magnitude, we can obtain it from the velocity by calculating only the magnitude given as:
...Equation 1
From the question, we were given the position vector, r
The velocity can be obtained by differentiating r with respect to time, t
We have that differentiation of a constant is 0.
![v = \frac{dr}{dt} = \frac{d}{dt}[(2.0+5.00t)i + (3.0 - 3.00t^{2})j] \\\\v = 0 + 5.00i + 0 - (6.00t)j](https://tex.z-dn.net/?f=v%20%3D%20%5Cfrac%7Bdr%7D%7Bdt%7D%20%3D%20%5Cfrac%7Bd%7D%7Bdt%7D%5B%282.0%2B5.00t%29i%20%2B%20%283.0%20-%203.00t%5E%7B2%7D%29j%5D%20%20%20%5C%5C%5C%5Cv%20%3D%200%20%2B%205.00i%20%2B%200%20-%20%286.00t%29j)
At time t = 2.00s,
To obtain the speed, we use equation 1
<em>Therefore, the speed of the object at time t = 2.00s is 13.00m/s</em>
<span>To balance her check register, Jessica needs to subtract the balances from her bank statement and then add the difference to the ending value of her check register. If entries in her bank statement do not appear in her check register, or vice versa, these transactions need to be tallied and then the added or subtracted from the ending balance in her check register.</span>
1.23+0.9= 2.13
<span>2.13-1.05= 1.08
Happy studying ^_^</span>
Let x = new apple price
Let y = $0.75 additional price
Let z = original price
3 pounds = apple Sam bought
$5.88 = total amount of apples Sam bought
1st, let
us divide 3 pounds from $5.88
5.88 ÷ 3 = 1.96 this
is the new apple price per pound.
X = $1.96
2nd, if you want to find the original price of
the apples per pound before the increase, we just need to subtract the X to Y.
$1.96 –$ 0.75 = $1.21 is the original price of apple before the increase.
I am assuming that it only 3 pounds of apples, since it will
be a negative / void if it will be 333 pounds, or even 33 pounds.
