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Consider a flask that contain 3 liters of salt water. Suppose that water containing 25 grams per liters of salt is pumped into the flask at the rate of 2 liters per hour, and the mixture, being steadily stirred, is pumped out of the flask at the same rate. Find a differential equation satisfied by the amount of salt 𝑓(𝑡) in the flask at time 𝑡.
Objective:
Design a class called NumDays. The class’s purpose is to store a value that represents a number
of work hours and convert it to a number of days. For example, 8 hours would be converted to
1 day, 12 hours would be converted to 1.5 days, and 18 hours would be converted to 2.25 days.
The class should have a constructor that accepts a number of hours, as well as member
functions for storing and retrieving the hours and days.
The class should also have the following overloaded operators:
• + Addition operator. When two NumDays objects are added together, the
overloaded + operator should return the sum of the two objects’ hours members.
• − Subtraction operator. When one NumDays object is subtracted from another,
the overloaded − operator should return the difference of the two objects’ hours
members.
1. Human colour vision is “produced” by the nervous system based on how three different cone receptors interact with photons of light in the eye. These three different types of cones interact with photons of different frequency light, as indicated in the following chart:
Cone Type Range of Light Frequency Detected
S 6.00-7.49 x 1014 s-1
M 4.76-6.62 x 1014 s-1
L 4.28-6.00 x 1014 s-1
What wavelength ranges (and corresponding colours) do the three types of cones
detect?
1. Subshells half-filled with electrons are particularly stable. Can you suggest a possible
physical basis for this claim?
Get the distinct ids of videos that belong to the following genres.
genre_id genre
201 Comedy
202 Action
203 Thriller
211 Scifi
Note:
Sort the output in the descending order ofvideo_id
Expected Output Format
video_id
Please help
Aneco an Electrical Company claims that the average lifeof the bulbs it manufactures is 1,200 hours with a standard deviation of 250 hours. If random sample of 100 bulbs is chosen, what is the probability that the sample mean will be.
A sociologist believes that it costs more than P90,000 with a standard deviation of
P4,500 to raise a child from birth to age one. A random sample of 49 families, each with
a child is selected to see if this figure is correct. The average expenses for these families
reveal a mean of P92,000. Based on these sample data, can it be concluded that the
sociologist is correct in his claim? Use 0.05 level of significance.
Step:
1.State the null and alternative hypothesis
concerning the population mean, "\\mu" and the
type of test to be used
2. Specify the level of significance "\\alpha"
3. State the decision rule.
4. Collect the data and perform calculations.
5. Make a statistical decision.
6. State the conclusion.
Find out whether the following functions are one to one or not
(a) f(x)=3x+4 (b) f(x)=x²+4 (c) h(x)=13x⁵+5 (d) g(x)=x⁴+3 (e) p(x)=1/x+3 (f) f(x) =|2x+5|
Techworld is a technology training center, providing training to their clients on various technologies.They need to automate the process of allocating instructiors for different courses.An instructor is identified by his/her name and may be skilled in multiple technologies .Assume that the skills of an instructor are stored in an array.
We are going to create class of Matrix. You have to write the definition of the following function given below in the Matrix class. class Matrix{ private: int noOfRows ; int noOfColumns; int ** data; public: Matrix(int noOfRows, int noOfColums); void displayData(); -Matrix(); Matrix(const Matrix & ref);You have to write down the definition of following functions. 1. Matrix(int noOfRows, int noOfColums) 2. void displayData0; 3. -Matrix(); 4.Matrix(const Matrix & ref)
#339914 on Dec 2023