What is -3/5 x -10/21?

in 1985, there were 285 cell phone subscribers in the small town of Centerville. the number of subscribers increased by 75% per

Vladimir79 [104]

Answer:

43,872

Step-by-step explanation:

The growth of cell phone subscribers in Centerville can be modeled by an exponential function.

y = ab^x . . . . . where a = initial value, b = growth factor

The growth rate is given as 75% per year, so x will have units of years. It will be zero for the year 1985. The growth factor is ...

b = 1 + growth rate = 1 +0.75 = 1.75

Then the model is ...

y = 285·1.75^x

__

For x = 1994 -1985 = 9, the number of subscribers is modeled as ...

y = 285·1.75^9 ≈ 43,872

The model predicts 43,872 cell phone subscribers in 1994.

7 0

2 years ago

Figure PQRS is a parallelogram.

ASHA 777 [7]

Using the rule of angles in parallel lines, ∠Q and ∠R are supplementary to each other

∠Q+∠R = 180°
$x+15+6x-10=180$
$7x+5=180$
$7x=180-5$
$7x=175$
$x=25$

Size of ∠Q = 25+15 = 40°
Size of ∠R = 6(25) - 10 = 140°

∠Q also supplementary with ∠P, hence ∠P = 140°
∠P supplementary with ∠S, hence ∠S = 40°

7 0

3 years ago

Read 2 more answers

find the probability exactly 3 successes in 6 trials of a binomial experiment in which the probability of success if 50%. round

Dennis_Churaev [7]

Answer:

Hence, the probability of exactly 3 successes in 6 trials of a binomial experiment round to the nearest tenth of a percent is:

31.2%

Step-by-step explanation:

The probability of getting exactly k successes in n trials is given by the probability mass function:

$P(k;n,p)=P(X=k)={\binom {n}{k}}p^{k}(1-p)^{n-k}$