Answer: 169.2cm
Step-by-step explanation:
From the question, we are informed that three equal-sized cardboard boxes are stacked on top of each other and that each box is 56.4 cm in height.
To get the combined height of the 3 stacked boxes, we multiply 56.4cm by 3. This will be:
= 56.4cm × 3
= 169.2cm
Answer:
Step-by-step explanation:
The position of an object moving horizontally after t seconds is given by the function
s = 3t - t³
a) The object is stationary when there is no external force acting on the body. When the body is at rest, the body remains in a position and here is no distance covered by the object i.e s = 0
b) velocity is the change in displacement of a body with respect to time.
v = ds/dt
S = 3t - t³
V = ds/dt = 3-3t²
at t = 2
Velocity = 3-3(2)²
Velocity = 3-12
Velocity = -9m/s
c) acceleration is the change in velocity of a body with respect to time.
acceleration = dv/dt
If v = 3-3t²
a = dv/dt = -6t
When v = 0
0 = 3-3t²
-3 = -3t²
t² = 1
t = ±√1
t = 1sec
The acceleration of the object at v = 0 occurs at t = 1sec and -1sec
a = -6(1)
a = -6m/s²
d) Given the speed of the body v modelled by the function
v = 3-3t²
The speed is decreasing when it is less than zero as shown:
3-3t²< 0
3<3t²
1<t²
±1<t
1<t and -1<t
t>±1
t >1 and t>-1
The speed is decreasing when
3-3t²<0 and t>1 or t>-1
Answer: She will have to save for 8 weeks.
Step-by-step explanation:
164 = 52 + 8w
w = week
-52
112 = 8w
/8
14 = w
52n
for example Lamar has three decks. 52 times 3 equal how much cards he have.
<h2>
Answer:</h2><h2>
Roger's profit = %0.5 (I) - $7</h2><h2>
The minimum number of cups of lemonade you have to sell in order to make a profit = 15</h2>
Step-by-step explanation:
Roger spends $7 to buy supplies for making lemonade.
Cost price = $7
He plans to sell each cup of lemonade for $0.50.
Selling price of one cup of lemonade = $ 0.5
Selling price of I cups = $0.5 (I)
(i) The equation that repesents profit earned by Roger is
Profit = Selling price - cost price
Profit = %0.5 (I) - $7
(ii) the minimum number of cups of lemonade you have to sell in order to make a profit is
By selling minimum 15 cups, the profit earned is
Profit = %0.5 (15) - $7
Profit = $0.5
