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A recent study of 280 people showed that between about 70 and 80 percent of Americans over 60 do not have enough savings to retire.
A) What is the sample proportion in decimal form?
B) Find the margin of error in decimal form
C) What is the number of people in the survey who do not have enough to retire?
A busy waitress slides a plate of apple pie along a counter to a hungry customer sitting near the end of the counter. The customer is not paying attention, and the plate slides off the counter horizontally at 0.84 m/s. The counter is 1.38 m high. ..
A 3.83 ohm resistor, a 7.53 ohm resistor, and a 9.02 ohm resistor are connected in series with a 15.0 V battery. What is the current in each resistor
Ultrasound reflected from an oncoming bloodstream that is moving at 22.0 cm/s is mixed with the original frequency of 3.00 MHz to produce beats
A 2 kg rock is released from rest at a height of 29 m. neglect air resistance and determine the kinetic energy, gravitational potential energy, and total mechanical energy at each of the following heights: 20m; 15m; 5m; 9m.
Why does a high-flying airplane cast little or no shadowon the ground below while a low-flying airplane casts asharp shadow?
Student C and D push on a box at the same time. The students are only pushing horizontally. No one pushed down or up on it. There is no friction. Find the magnitude and direction of the net force on the box
Think about an atomic nucleus to be equivalent to a one-dimensional infinite potential well with L = 1.1 x 10-14 m, a typical nuclear diameter. What would be the ground-state energy (in GeV) of an electron if it were trapped in such a potential well?
Light in air is incident at the polarizing angle on a certain piece of glass. The angle of refraction is 32°. Evaluate the index of refraction of the glass
An electric vehicle starts from rest and accelerates at a rate of2.2 m/s2 in a straight lineuntil it reaches a speed of 14 m/s. The vehicle then slows at a constant rate of 1.0 m/s2 untilit stops. How much time elapses from start to stop?
The atmosphere of the sun consists mostly of hydrogen atoms (not molecules) at a temperature of 6000 K. What are the average translational kinetic energy per atom
A 7.50 kg box is pushed across a floor by a constant force applied force at 25 degrees. the box starts from rest and moves at 1.20 m/s after the box is moved 5.00 meters. The coefficient of friction is .320 What is the magnitude of the force applied ..
A camera manufacturer wishes to deposit a non-reflective coating onto a glass lens for a wavelength of 550 nm. The index of refraction of the coating material is 1.38 and that of the glass is 1.53. Find the smallest three possible thicknesses for ..
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