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MATH SOLVE
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A 5.5-foot-tall woman walks at 4 ft/s toward a street light that is 27.5 ft above the ground. what is the rate of change of the length of her shadow when she is 16 ft from the street light? at what rate is the tip of her shadow moving?
General
2 months ago
factorise 2x^3+9x^2+10x+3
General
2 months ago
I require assistance, please
General
2 months ago
What is the area of this irregular shape
General
2 months ago
There are 5 red pens,3 blue pens and 2 green pens in a box. Gary takes at random a pen from the box and gives the pen to his friend. Gary then takes at random another pen from the box . work out the probability that both pens are the same colour.please help
General
2 months ago
A bag contains 12 counters. 7 of them are white. A counter is taken at random and not replaced. A second counter is taken out of the bag at random. Calculate the probability that only one of the two counters is white
General
2 months ago
evaluate (100)^3 - 30(40)-1
General
2 months ago
etermine whether the system of linear equations has one and only one solution, infinitely many solutions, or no solution. 3 2 x − 2y = 4 x + 1 3 y = 2 one and only one solution infinitely many solutions no solution Find the solution, if one exists. (If there are infinitely many solutions, express x and y in terms of the parameter t. If there is no solution, enter NO SOLUTION.) (x, y) =
General
2 months ago
2. A science museum has a spherical model of the earth with a diameter of 8.5 m. What is the volume of the model? Use 3.14 for and round your answer to the nearest whole number. Show your work.
General
2 months ago
Determine whether the system of linear equations has one and only one solution, infinitely many solutions, or no solution. 2x − y = 2 3x + y = −6 one and only one solution infinitely many solutions no solution Find the solution, if one exists. (If there are infinitely many solutions, express x and y in terms of the parameter t. If there is no solution, enter NO SOLUTION.) (x, y) =
General
2 months ago
Sloane believes there is a correlation between the number of texts sent in class and GPA. She collected data and found that the line of best fit for the data can be modeled by the equation y = 4.0 − 0.5x.Identify and interpret the slope in this scenario.a. The slope is −4.0. Starting at 0.5, the GPA will decrease by 4.0 for every text sent in class.b. The slope is −0.5. Starting at 4.0, the GPA will decrease by 0.5 for every text sent in class.c. The slope is 4.0. Starting at 0.5, the GPA will increase by 4.0 for every text sent in class.d. The slope is 0.5. Starting at 4.0, the GPA will increase by 0.5 for every text sent in class.
General
2 months ago
find the discriminant and the numbers of real roots for this equation: 4x^2+12x+9=0
General
2 months ago
determine if it is possible to form a triangle using the segments with the given measurements42) 8ft, 9ft, 11ft43) 7.4cm, 8.1cm, 9.8cmEXPLAIN YOUR REASONING!
General
2 months ago
A simple random sample of size nequals40 is drawn from a population. The sample mean is found to be 103.9, and the sample standard deviation is found to be 21.9. Is the population mean greater than 100 at the alphaequals0.05 level of significance?
General
2 months ago
Write the expression as either the sine, cosine, or tangent of a single angle.sin 52° cos 13° - cos 52° sin 13°
General
2 months ago
Choose the correct answer below. A. The first step in the process of statistics is to collect the data. B. Data are typically collected from a sample because it is too difficult and expensive to collect data from an entire population. C. When the results from a sample are extended to the population, it is called inference. D. If data are not collected properly, the conclusions that are drawn will be meaningless.
General
2 months ago
Which expression can be used to determine the slope of the line that passes through the points (-7,3) and (1,-9)
General
2 months ago
The life of a light bulb is exponentially distributed with a mean of 1,000 hours. What is the probability that the bulb will last less than 800 hours?
General
2 months ago
Solve by using the quadratic formula.3psquared+7p+2=0
General
2 months ago
Every year, roughly 25,000,000 kg of hair is cut in the United States. Each kilogram of hair contains about 0.0002 kg of zinc, and each kilogram of zinc is worth about $444. How many dollars worth of zinc is contained in hair cut in the United States every year?
General
2 months ago
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