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A box contains 20 balls that are exactly alike except that 10 are red, 6 are blue, and 4 are black. (a) If a single ball is drawn from a box, what is the probability tat it is red? (b) If a single ball is drawn from the box, what is the probability that it is blue or black? (c) If instead two balls are drawn from the box at the same time, what would be the probability that both are black?
If the atmospheric pressure is 108.2 kPa and the gage attached to the tank reads 192 mmHg vacuum, find the absolute pressure within the tank.
Determine the Weight f the Sample, if it Used 24.9ml of 0.1Normal Sodium Hydroxide of Titrant {33.29% of Busulfan (C7H6O2)}
Lindiwe decides that she would like to buy her daughter a car when she turns 21 in six years time .She deposits R 6000 each month into an account earning 8.94% interest per year compounded monthly. The amount that Lindiwe will have available in six years from now is.
Colored Wheel
A survey on 200 Senior High School learners on how much time they read per
week has a confidence interval of (13.5, 17.9) in hours at 95% confidence level.
What is the margin of error? _________________________
What is the average time they read per week? __________________
A uniform electric field of 500 N/C is established between two oppositely charged metal plates. A particle with a charge of +0.003 C is moved from the bottom (negatively charged) plate. The string is tied to the charged that is pulling it upward. The distance between the plates is 5 cm.
a. What is the change in the potential energy of the charge?
b. What is the change in electric potential from the bottom to the top plate?
Ten kilograms of steam at 100
0C is condensed in 500 kg of water
at 40 0C. What is the resulting temperature? (Ans: 51.8 0C
What are the two theoretical approaches to poverty as a social problem?
In a 300-m race, runner A starts from rests and accelerates at 1.6m/s2
for the first 30 m and then runs
at a constant speed. Runner B starts from rests and accelerates at 2.0m/s2
for the first 30m and then
runs at a constant speed. Runner A begins running as soon as the race begins but B firsts takes a nap
to rest up. What is the longest nap that B can take and still not to lose the race?
Compute the length of the confidence interval for estimating the population
mean using a sample size of 300 and with a standard deviation 84. Use a 92%
confidence level.
