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a boy is in a swimming pool with index n2=v2. Knowing that the smallest index is 2, find the limiting angle of refraction

Using a total station, the rectangular dimensions of a building are measured, it is 600.870 ± 0.019 m by 350.080 ± 0.016 m. Assuming only errors in the remote observations, calculate: • Area delimited by the building and its error propagation • Building perimeter and its error propagation

Domain of the function x+1/x²+3

For a particular variety of wheat, it has been estimated that 5 percent of plants suffered an illness. A sample of 600 plants of the same variety of wheat was observed and found that 50 plants were infected with disease. Test if the sample the results were consistent with the population.

A straight line has slope K= 3/2  and passes through the point (6,3) Does the line also pass through the point (-130, -200)?

A catheter of a right triangle measures 30cm. The hypotenuse of the triangle measures 2cm more than double the measurement of the other catheter. What is the area of the triangle

I spent a quarter of my money and then received an amount equal to twice the money I had left. If I now have 30 euros more than at the beginning, how many euros did I have?

A positive integer is 1 less than another. If the sum of the reciprocal of the smaller and twice the reciprocal of the larger is 19/42, then find the two integers

A die is rolled 2 times. Determine the probability that the sum of the faces is: a) 3 b) 7 c) 10

6x^2+x-12. Factor is the problem