11/16/22

Density probability
From this density, the probability that X > 1.04 or X < 0.04 is:
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11/16/22

Chemistry Question
Potassium nitrate is widely used as a fertilizer because it provides two essential elements, potassium and nitrogen. It is made by mixing potassium chloride and nitric acid in the presence of... more
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11/15/22

find a solution for the following function
Consider the following graph of the function g(x) which is a transformation of the cosine function, f(x)=cos⁡(x). Find a formula for g(x).g(x)=   (If the amplutide doesn't look like an integer, try... more
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11/15/22

Plz help me solve this equation
In a certain county there are two radio stations: the Maisha FM and the Jambo FM. A researcher interested in the loyalty to stations of this county found the following:Of those who listen to the... more
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11/15/22

How much energy is required to melt 962 g of ice into liquid water at °C? The heat of fusion for water is 333.6 J/g.

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11/15/22

Wave Length and Frequency
Radio astronomers use radio frequency waves to identify the elements in distant stars. One of the lines that is studied is designated the 166α166α line. This spectral line refers to the transition... more
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11/14/22

A car is travelling at 67mph (30m/s) when the driver steps on the brake slowing the car down at a rate of 3m/s2. How long and what distance will be required for the car to stop on dry pavement?
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11/14/22

how do you solve this? with what formula?
an astronaut has landed on a known planet. She drops a wrench from a height of 8.04 meters above the surface. The wrench takes 5.50 seconds to fall to the surface. What is the acceleration of... more
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11/14/22

solution stoichometry

25.0 g of zinc are reacted with 1855 mls of 0.250 M hydrochloric acid. How many grams of hydrogen gas are produced?
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11/14/22

B. Find the numerical values of ∂z∂s and ∂z∂t when (s,t)=(5,−5).
) Suppose z=x2sinyz=x2sin⁡y, x= -3s^2+2t^2, y=6stA. Use the chain rule to find ∂z∂s∂z∂s and ∂z∂t∂z∂t as functions of x, y, s and t.dz/ds = -12sxsiny+6tx^2cosy (I got this right)dz/dt =... more
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11/11/22

Electron Orbitals
A single electron in an orbital has quantum numbers n = 3, ℓ = 0, mℓ = 0, ms =-½. What are the quantum numbers for the next electron added to this orbital?A) n = 3, ℓ =1, mℓ = 0, ms = +½B) n = 3, ℓ... more
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11/11/22

In a normal distribution
what is the probability that a random sample of 305 with population proportion 0.46 has a sample proportion of between 0.42 and 0.42?
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11/11/22

standard deviation

The national average for mathematicsSATS in 2011 was 514. Suppose that the distribution ofscores was approximately bell-shaped and that the stan-dard deviation was approximately 40. Within... more
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11/10/22

A box has a square base of side x and height h. Find the dimensions x, h for when the volume is 12 and the surface area is as small as possible.

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11/10/22

The number of online buyers in Western Europe grew steadily over the past decade.

The number of online buyers in Western Europe grew steadily over the past decade. The functionP(t) = 28.9 + 14.73 ln t  (1 ≤ t ≤ 7)gives the number of online buyers as a percent of the total... more
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11/10/22

The specific heat of a certain type of metal is 0.128 J/(g⋅∘C). What was the intial temperature if 0.305 kJ of heat is added to 82.6 g of metal to reach a temperature of 85.0 ∘C?
56.15239104 is incorrect.
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11/10/22

Conversion between Celsius and fahrenheit
I know the formula for converting Celsius to Fahrenheit. Why do all the experts on climate warming warming and the media say that one degrees Celsius is equal to 1.8°F could it be because there’s... more
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11/10/22

How to calculate the heat gained by the calorimeter
How to calculate the heat gained by the calorimeter, given, initial mass of calorimeter=40.32g, initial temp° = 31°c, temp° of hot water= 62°c, final temp° after mixture =54°c, final mass= 94.62g,... more
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11/10/22

Calculate the temperature of 7.32 mol of a gas at 595 torr and 984 mL. Use R = 62.4 L torr/mol K
Formula to use: PV = nRTThis question also involves with converting into liters.
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11/09/22

𝑓(𝑥)={2𝑥−8 8−2𝑥 if 0≤𝑥<4, if 4≤𝑥≤8. Evaluate the definite integral by interpreting it in terms of signed area. ∫80𝑓(𝑥)𝑑𝑥=
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11/09/22

Please help me!
A person standing a certain distance from an airplane with four equally noisy jet engines is experiencing a sound level of 132 dB.  What sound level would this person experience if the captain... more
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11/09/22

Vector homework question - multiple answer
I received a multiple answer question on my homework with the following question:Find the y-coordinate of a vector that has the length 5 and is perpendicular to the vector a→ = (-6 -8).The answer... more
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11/09/22

Water is leaking out of an inverted conical tank at a rate of 13,000 cm3/min at the same time that water is being pumped into the tank at a constant rate
Water is leaking out of an inverted conical tank at a rate of 13,000 cm3/min at the same time that water is being pumped into the tank at a constant rate. The tank has height 6 m and the diameter... more
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11/09/22

high school physics

ALWAYS use significant figure rules. Remember that these rules apply to all numbers that are measurements.A missile is fired from a jet flying horizontally at Mach 2 (2200 ft/s). The missile has a... more
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11/09/22

Optimization Calc 1
The top and bottom margins of a poster are 2 cm and the side margins are each 3 cm. If the area of printed material on the poster is fixed at 390 square centimeters, find the dimensions of the... more
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