Answer:
positive charge...............
A straight line is 180° so....
9x+24 +6x - 24 = 180
15x=180. ( because you have to combine like terms.
X= 12
Answer:
D)
Step-by-step explanation:
You have to use the laws of exponents to solve this:
Power of a Power: . In this case, , all of the numbers in the parenthesis need to be multiplied to the power of 3: .
Quotient of Powers: . In this case, , all of the exponents need to be subtracted (but the 4³ (64) and 8 need to be divided): .
Use the Power of a Power again for the expression at the right: . You get: . Keep the subtraction/negative sign where it is.
Together, you get: .
Hope it helps!
Answer:
$15600
Step-by-step explanation:
Minimum number of samples can be calculated using the formula:
N≥ where
- N is the sample size
- z is the corresponding z-score for 95% confidence level (1.96)
- s is the standard deviation of the calorie consumption (450 cal.)
- ME is the margin of error that the researcher is willing to accept. (50 cal)
N≥ =311.2
Therefore, minimum required sample size for 50 cal standard error in 95% confidence is 312
Since the survey costs $50 for each person then the survey costs minimum
50*312=$15600