2,195 Answered Questions for the topic Pre Calculus

Pre Calculus Math Algebra

05/21/20

math dude, its math
how do ya find the y intercept of y = -mn-(tx + 8t)it must be a positive exponent in simplest form.
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Pre Calculus Precalculus

05/20/20

Help me please with this

Pete discovered a new radioactive substance, and named it Vassilium. The half-life of Vassilium is 218 years. If he starts with 20 grams of the substance, write a function to represent the... more
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Pre Calculus

05/19/20

Suppose you know the high temperature of 63 degrees occurs at 6 PM and the average temperature for the day is 45 degrees. Find the temperature, to the nearest degree, at 9 AM.
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Pre Calculus Math

05/19/20

can someone please help me qith this question i am having trouble please
Peter is throwing a ball at an initial velocity of 28 feet per second and an angle of 56 with the horizontal from a height of 4 feet.a)how far away will the ball land?b)what will be its max... more
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05/18/20

Suppose $22,800 is invested in a daily compounded account at 6.97%. Approximately how long will it take for the balance to reach $51,300 ?
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05/18/20

For a submarine to stay submerged, it must be neutrally buoyant, which means it is maintaining a careful balance between its weight and the buoyant force of water pushing it toward the surface.
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Pre Calculus Precalculus Pre Calculus

05/18/20

How much should be deposited in an account paying 5% interest, compounded quarterly, in order to have a balance of $ 9,000 after 29 years and 6 months?
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Pre Calculus Precalculus Pre Calculus

05/18/20

A credit union client deposits $1,600 in an account earning 4% interest, compounded monthly. What will the balance of the account be at the end of 15 years?
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Pre Calculus Math Precalculus Sat Math

05/18/20

Use the discriminant to describe the number of x -intercepts of f(x)=2x^2−5x−4.
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Pre Calculus Calculus Precalculus

05/16/20

MEASURING LENGTHS BASED ON THE ANGLE OF INCLINATION/DECLINATION; APPLYING THE LAWS OF SINES AND/OR COSINES; FINDING THE TRIGONOMETRIC VALUE USING THE SUM/DIFFERENCE FORMULA.

Question(1): Suppose that a person is on top of a building and the person is 1025 feet above the ground. The person throws an object in a downward diagonal direction. The person who threw the... more
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Pre Calculus Calculus Precalculus

05/16/20

SOLVING TRIGONOMETRIC EQUATIONS AND FINDING TRIGONOMETRIC VALUES BASED ON GIVEN INFORMATION.

Find all x, such that 0 ≤ x ≤ 2π1) tan(x) = -12) 2cos(x) - 1 = 03) sin(2x) = 2cos(x)
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05/15/20

Precalculus question?
Suppose T(t)=23sin(2π(t-7)/24)+66 is the temperature (in degrees Fahrenheit) at time t, where t is measured in hours after midnight on Sunday. You paint the exterior door to your house at 5 p.m. on... more
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05/15/20

Precalc question
a) If y=sin(x) on the domain -π/2 ≤ x ≤ π/2, what is the domain D and range R of y=2sin(3x-1)+3? How many solutions does the equation 4=2sin(3x-1)+3 have on the domain D and what are they?b) If... more
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05/14/20

Precalc question
The temperature in Gavin’s oven is a sinusoidal function of time. Gavin sets his oven so that it has a maximum temperature of 300F and a minimum temperature of 240F. Once the temperature... more
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Pre Calculus Precalculus Trigonometry

05/14/20

Please helpppp need pic

Khrystyna and Chris are standing 300 feet away from each other on flat ground looking up at a crane. If Khrystyna’s angle of elevation to the crane is 49˚ and Chris’s is 78˚, what is the height... more
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Pre Calculus Precalculus

05/13/20

Please help me with this

A road has an angle of elevation of 18˚, and the angle of elevation of the sun is 35˚. If a post next to the road is casting a 10-foot shadow downhill, how tall is the post?
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Pre Calculus Precalculus

05/13/20

Please help need a picture of this please

You are driving on a course of 105˚. A radio station that is due East and 30 miles away from your current location puts out a signal with a 25 mile radius. If you continue on your 105˚ course,... more
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Pre Calculus Precalculus

05/13/20

Please help! Need to draw pic

Elsa and Anna are standing 150 feet apart on flat ground looking at a tower. The angle ° 56 of depression from the top of the tower to Elsa’s feet is . The angle of depression from ° 75... more
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Pre Calculus

05/13/20

Probability Question
An exam consist of ten true or false questions. If a student guesses at every answer, what is the probability that he or she will answer exactly six questions correctly?
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Pre Calculus Sat Math

05/12/20

Find an equation of the line that satisfies the given conditions. Through (−6, −6); perpendicular to the line passing through (−3, 6) and (1, 4)
Find an equation of the line that satisfies the given conditions.Through (−6, −6);  perpendicular to the line passing through (−3, 6) and (1, 4)
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Pre Calculus Precalculus

05/12/20

Can the graph of a rational function cross a horizantal asymptote ?
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Pre Calculus Calculus Precalculus

05/11/20

Use mathematical induction to show that (1∙2) + (2∙3) + (3∙4) +⋯+ n(n+1)= [n(n+1)(n+2)]/3
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Pre Calculus Calculus Precalculus

05/11/20

Express the series using sigma notation: cos2x + cos4x + cos6x +...+ cos40x
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Pre Calculus Sat Math

05/10/20

Phyllis invested 11,500 a portion earning a simple interest rate of, 6.25% per year and the rest earning a rate of 6% per y
Phyllis invested 11,500 a portion earning a simple interest rate of, 6.25% per year and the rest earning a rate of 6% per year. After one year the total interest earned on these... more
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Pre Calculus

05/09/20

Evaluate the function at the indicated values. (If an answer is undefined, enter UNDEFINED.)
f(x) = x2 + 9xf(0)= f(3)=f(-3)=f(a)=f(-x)=f(1/a)=
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