It will hit the ground when h(t)=0. Since the hammer is simply dropped its initial velocity, v0, is equal to zero and we are told that the initial height, h0, is 25m so our equation is:
h(t)=-4.9t^2+25, we want h(t)=0 so:
4.9t^2-25=0 add 25 to both sides
4.9t^2=25 divide both sides by 4.9
t^2=250/49, since t>0
t=+√(250/49) seconds
t≈2.3 seconds (to the nearest tenth of a second)
Steve has 30 cards if you add 39 and 51 in the divided by three you will get 30 which is the amount of cards Steve has
Answer:
14
Step-by-step explanation:
if you plug in 9 for x in the equation x+5, you get 9+5
9+5=14
Answer:
t = - 1/8
Step-by-step explanation:
t ÷ 5/12 = - 3/10
t × 12 ÷ 5 = - 3/10
12t/5 = - 3/10
12t × 10 = -3 × 5
120t = - 15
t = - 15/120
t = - 1/8
Thus, t divided 5/12 = - 3/10 => -1/8
<u>-TheUnknown</u><u>S</u><u>c</u><u>ientist</u>
Answer: The number of points added for r right answers is 12r. The number of points taken away for w wrong answers is 4w, so Olga's total points will be
... 12r -4w
To win, she needs this number to be more than 400. Your inequality is ...
... 12r -4w > 400
