A "whole" will be 7/7, or just 1 whole.
so we know one bag can do 1/7 of all students, how many will it be needed to do 7/7?
well, in 7/7 there are seven 7/7, so, 7 bags then, or one could say,
Answer: -12
Step-by-step explanation:
-12 is greater than -21 because -12 is the closest to 0 on the number line.
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.
Total length of the string Kevin has = 3/4 yard.
He used 1/3 of the total length of the string.
We have total length 3/4 yards.
Therefore,<em> we need to find the 1/3 of 3/4 yards.</em>
1/3 × 3/4
We can see that we have 3 in the bottom of first fraction and 3 on the top of second fraction.
Crossing out 3's we get,
= 1/4 yards.
<h3>Therefore, he used 1/4 yards of string for his project.</h3>
Answer: 3
Step-by-step explanation:
the statement given us:
7a-5b+4
a= 2
b= 3
so we have:
7*(2)-5*(3)+4
14-15+4 = 3
the answer is 3
