Step-by-step explanation:
To do this, divide the numerator by the denominator. The result is the decimal form of the ratio. For example, convert 7:2 to a decimal value.
Answer:
1: 2,20,200,2000,20000,2000000
2: 1,1,2,3,5,8,13,21,34
3:1,4,9,16,25,36,49,64
Step-by-step explanation:
1: 2,20,200,2000,20000,2000000
2: 1,1,2,3,5,8,13,21,34
3:1,4,9,16,25,36,49,64
Answer:
hello there!
i hope my answer will help you :)
Step-by-step explanation:
DEFINATION- Gross profit margin is a profitability ratio that measures how much of every dollar of revenues is left over after paying cost of goods sold.
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FORMULA- Gross profit margin is calculated by subtracting cost of goods sold (COGS) from total revenue and dividing that number by total revenue.
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THE IMAGE BELOW IS THE MATHEMATICAL REPRESENTATION IN CALCULATION OF THE STATED FORMULA
Answer:
D
Step-by-step explanation:
f(-1) = -5, so C is incorrect
f(0) = -1, so D is correct
Answer:
H0 rejected as μ>4
and a fish is unsafe to eat from the lake.
Step-by-step explanation:
1)Let the null hypothesis be H0 : mu ≤4 against the alternate Ha: mu > 4 ppb
H0: μ ≤4 against the claim Ha: μ>4
2) X`= ∑x/ n= 2.9 +7.6+ 4.8+ 5.2+ 5.1+ 4.7+ 6.9+ 4.9+ 3.7+ 3.8/10
= 49.6/10= 4.96
The standard deviation can be calculated sigma= 1.344767 ( using statistic calculator)
3) The significance level is taken to be ∝=0.05
The value of z at 0.05 for 1 sided test is z >± 1.645
i.e the critical region is less than - 1.645 and greater than +1.645
4) Taking the distribution to be approximately normal
Z= x`- u / s/ √n
Z= 4.96-4/ 1.345/10
Z= 4.96-4/ 1.345/3.1622
Z= 0.96/0.4253
Z= 2.257
5) Since the calculated value of z = 2.257 falls in the critical region we reject our null hypothesis and conclude that true mean value of the PCB concentration is greater than 4 (ppb) and that a fish is unsafe to eat from the lake.
