Answer:
3(1/2t + 2*0.50)=$12 t=6
Step-by-step explanation:
3(1/2t + 2*0.50)=$12
3(1/2t + 1) = 12 apply multiplication
3/2t + 3 = 12 apply multiplication
1.5t + 3 = 12 Subtract 3 from both sides
1.5t = 9 Divide by 1.5
t= 6
Answer & Step-by-step explanation:
a. 4x + 3 {sum means add the numbers together}
b.
{quotient means divided by}
c. 
Given :
A squirrel climbs up a tree. She starts at 0.5 feet up the tree, then climbs at a steady pace for 7.5 seconds.
She ends 4 feet up the tree.
Solution :
Now, distance covered is :
d = 4 - 0.5 = 3.5 feet.
Time taken, t = 7.5 seconds.
Distance climbed per second is :

Therefore, distance climber per second is 0.467 feet.
Hence, this is the required solution.
The expression that represents the density is D = h^2 - 4h + 20/pi h^2
First, find the z-score:
z = (value - mean) / sdev
= (275 - 280) / 15
= - 0.33
In order to use a standard normal table, we need a positive z-score:
P(z < -0.33) = 1 - P(z < 0.33)
Looking at the table, we find P(z < 0.33) = 0.6293
Therefore:
P(z < -0.33) = 1 - 0.6293 = 0.3707
Hence, you have a probability of about 37% <span>that a randomly selected pregnancy lasts less than 275 days.</span>