The answer is 3x^2-12=-12, imiplies <span>3x^2 = - 12 + 12 = 0
so </span><span>3x^2 = 0 implies x = 0
there is one solution, x =0</span>
Answer:
68.268%
Step-by-step explanation:
We solve using z score formula
z = (x-μ)/σ, where
x is the raw score
μ is the population mean = $1900
σ is the population standard deviation = $200
For x = $1700
z = $1700 - $1900/$200
z = -1
Probability value from Z-Table:
P(x= 1700) = 0.15866
For x = $2100
z = $2100 - $1900/$200
= 1
Probability value from Z-Table:
P(x = 2100) = 0.84134
The probabilty of the population that has a rent price between $1700 and $2100
P(x = 2100) - P(x = 1700)
0.84134 - 0.15866
= 0.68268
Converting to percentage
= 0.68268 × 100%
= 68.268%
The percentage of the population that has a rent price between $1700 and $2100 is 68.268%
Answer:
= sign makes the statement true
Step-by-step explanation:
-15 = -15
Answer:
The quart bottle of cola for $1.50 is the better buy.
Step-by-step explanation:
In order to compare the amount of cola per cost, you need to first use the same measurements. Since one bottle is a quart and one bottle is a liter, we need to convert one to the other. There are approximately 1.06 quarts per liter. So, for the quart bottle, we can also say it has 1.06 liters of cola. To find the price per volume, we take the cost divided by the volume: 1.50 ÷ 1.06 = $1.42. The liter bottle costs $1.57. So, the quart bottle would be cheaper overall by approximately $0.15.
The total length of Jiamin's trip was
distance = speed × time
distance = (52 mi/h) × (5 h) = 260 mi
The distance Jiamin traveled in her first 2 hours was
distance = (50 mi/h) × (2 h) = 100 mi
That means she traveled the last (260 -100) mi = 160 mi in the remaining 3 hours. Her average speed for that portion of the trip was
speed = distance / time
speed = (160 mi) / (3 h) = (160/3) mi/h ≈ 53 1/3 mi/h
Jiamin's average speed for the last 3 hours of her trip was 53 1/3 mi/h.