Answer:
-1/4 meter per minute
Step-by-step explanation:
Since, the volume of a cube,

Where, r is the edge of the cube,
Differentiating with respect to t ( time )

Given, 
Also, V = 8 ⇒ r = ∛8 = 2,
By substituting the values,



Hence, the rate of change of an edge is -1/4 meter per minute.
He sold 87 muffins.
28.50 / 0.75=38 muffins, thats how much he had to sell to get hes money back on the supplies.
36.75 / 0.75=49 muffins, the profit money equals to 49 muffins, so 38+49=87
Answer:
It depends on the cost of grapes.
Step-by-step explanation:
Half of 12 is 6, so if each pack of grapes cost 6 or less, she can buy a pack of green and red grapes.
,4 and 19
........................
Answer
Find out the m∠p .
To prove
As in ΔDAB is a right triangle
Apply pythagorean theorem
Hypotenuse ² = Perpendicular ² + Base²
DB² = AB² + AD²
AB = 5 units
AD = 6 units
Put in the above formula
DB² = 5² + 6²
= 25 + 36
= 61

= 7.8 units (approx)
Now in ΔDCB is a right triangle .
By using the trignometric identity .


As DC = 4 units
DB = 7.8 units (approx)
Put all the values in the trignometric identity .


∠p = 59.15 ° (approx)