A government agency constructs a 95% confidence interval to estimate the mean amount of pollution in
a city's river. Assume that all conditions have been
met. The one-sample t-interval is (1.26. 3.91).
Water with 4.00 units of pollution or more, on
average, of this type of measure is said to be
contaminated. Is it reasonable to believe that this
city's river is contaminated?
O No. Because 4.00 is close to the upper bound of
the interval, it is reasonable to believe the river is
not contaminated.
O No. Because the interval representing the mean
amount of pollution is entirely below 4.00, it is
reasonable to believe the river is not
contaminated.
o Yes. Because 4.00 is close to the upper bound of
the interval, it is reasonable to believe the river is
contaminated
0 Yes. Because the interval representing the mean
amount of pollution is entirely below 4.00, it is
reasonable to believe the water is contaminated.

9) i can't see the angle so whatever it is just do this: cos(angle) x hypotenuse and then use that answer and they hypotenuse and plug it into this: (answer you just got)^2 + b^2 = (hypotenuse)^2. the first answer will be the answer of the adjacent side and the second answer after this equation will be the opposite side.

10) y = 14 x = √147 or 12.12435565

11) x = 4.8

12) x = 4.2

13) x = 9.3

14) pq: 13.2

qr : 17.6

angle p: 53º

15) angle c: 54.3º

angle a: 35.7º

16) h = 21040

v = 1841

step-by-step explanation:

10) 7/sin(30) = 14 = y

7^2 + b^2 = 14^2

49 + b^2 = 196

b^2 = 196 - 49

√b^2 = √147

x = √147

11) cos(70) x 14 = 4.788282007

x = 4.8

12) tan(25) x 9 = 4.196768923

x = 4.2

13) sin(31) x 18 = 9.270685348

x = 9.3

14) pq: sin(37) x 22 = 13.23993051

pq: 13.2

qr: cos(37) x 22 = 17.56998122

qr : 17.6

angle p: 180 - (37 + 90) = 53º

15) cos-1(7/12) = 54.31466529

angle c: 54.3º

angle a: 180 - (90 + 54.31466529) = 35.68533471

angle a: 35.7º

16) 4 x 5280 = 21120

cos(5) x 21120

h = 21039.63202

h = 21040

sin(5) x 21120

v = 1840.729287

v = 1841

125 yards

step-by-step explanation:

i take 75 plus 50.