. Solve: 5x < 9x-1 / 2
<span>-4x < - 1/2 , now divide by -4 and switch signs </span>
<span>x > 1/8 </span>
<span>2. There is a 20% chance that it will snow on Monday and a 40% chance on Tuesday. What is the probability that it will NOT snow on both Monday and Tuesday? </span>
<span>P( NOT snow on both Monday and Tuesday) = (1-.2)(1-.4) = 12/25 </span>
<span>c. 12/25 </span>
<span>3. The total cost of renting a sailboat is $120 plus $60 a day. How many days was a sailboat rented if the total cost was $360? Solve. </span>
<span>120 + 60d = 360 </span>
<span>60d = 360 - 120 = 240 </span>
<span>d = 4 </span>
<span>4. Two cards are chosen at random without replacement from a deck of 52 cards containing 4 kings. Which expression could be used to find the probability of choosing two kings? </span>
<span>b. 4/52 x 3/51 </span>
<span>There are 4 x 3 ways to pick 2 kings </span>
<span>There are 52 x 51 ways to pick any two cards</span>
Find the rate at which you work, that is, the # of walls painted per hour:
13 1/3 walls 40/3
------------------ = ---------- wall per hour
14 1/4 hr 57/4
Keep 40/3 as it is; invert the divisor (57/4) and then multiply the result by 40/3:
40 4 160 wall
------ * ------ = --------------- = approx. 0.94 wall in one hour, or 160/171 wall / hr
3 57 171 hr
Answer:
Step-by-step explanation:
Answer:
And rounded up we have that n=1068
Step-by-step explanation:
For this case we have the following info given:
the margin of error desired
the level of confidence given
The margin of error for the proportion interval is given by this formula:
(a)
the critical value for 95% of confidence is
We can use as estimator for the population of interest . And on this case we have that and we are interested in order to find the value of n, if we solve n from equation (a) we got:
(b)
And replacing into equation (b) the values from part a we got:
And rounded up we have that n=1068
Answer:
210
Step-by-step explanation:
double negatives = positive
-7 * -6 * 5 = 7 * 6 * 5 = 42* 5 = 210