Hello,

$u_{1} =1\\\\
 u_{2} =-4=1*(-4)= u_{1} *(-4)\\\\
 u_{3} =16=(-4)*(-4)= u_{2} *(-4)\\\\
 u_{4} =-64=16*(-4)= u_{3} *(-4)\\\\
 u_{5} =(-64)*(-4)= 256=u_{4} *(-4)\\\\

$
The sequence is geometric of ratio -4.

Answer 2 and 4 are good. others false

7 0

3 years ago

2a. According to a Pew Research survey, about 25% of American adults are pessimistic about the future of marriage and the family

drek231 [11]

Answer: 0.4181807

Step-by-step explanation:

Probability that American adults are pessimistic about the future of marriage and the family: p= 0.25

Sample size n= 20

Let $\hat{p}$ be the sample proportion of American adults that are pessimistic about the future of marriage and the family.

$P(\hat{p}\leq0.23)=P(\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}$

Hence, the required probability = 0.4181807

8 0

3 years ago

Work the following pricing problems for services rendered. (Round to hundredths.) Hourly rate, worker A = $15.00 Hourly rate, wo

svlad2 [7]

Hello there :-)

Total cost of job=retail price of goods+labor cost+overhead

Labor cost
15×2.5+8×1+5.25×(3÷4)
=49.44 this is labor cost

Overhead= labor cost×overhead rate
Overhead=49.44×0.75=37.08

Now find total cost of job
Total cost of job=125.50+49.44+37.08
=212.02....answer

Hope it helps

7 0

3 years ago