It is often said that more than one-fifth of all small businesses fail during the first year. Researchers from the University of Western Australia used data on 5,196 randomly-selected small business start-ups throughout Australia to test the hypothesis that the proportion of all small businesses that fail is in fact higher than 20%.What type of test is this?a. Left- Tailedb. Right- Tailedc. Two-Tailed

b. Right-Tailed

Step-by-step explanation:

This hypothesis test have a claim that the proportion of all small businesses that fail is higher than 20%. The alternative hypothesis is then written as:

If the sample outcome gives a test statistic that is higher than the critical value (z>z_c), it will fall in the rejection region and the null hypothesis, that states that the proportion is not different from 20%, will be rejected.

As the rejection region comprises all the values in the right tail, above the critical value, we can conclude this is a right-tailed test.

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!

the terms of a geometric sequence can be found by beginning with the first term and multiplying by the common ratio repeatedly. a recursive formula for a geometric sequence with common ratio r is given by an=ran−1 a n = r a n − 1 for n≥2 n ≥ 2 .

step-by-step explanation: