One model for the time it will take for the world’s oil supply to be depleted is given by the function t(r) = 14.29 ln(0.00411r + 1), where r is the estimated oil reserves in billions of barrels and t is the time in years before that amount of oil is depleted. use this function to answer the questions below. (round to the nearest billion barrels.) how many barrels of oil are necessary to last 30 years? how many barrels of oil are necessary to last 60 years?

Cumulative examcumulative exam active13time remaining02: 44: 18the graph represents the data cost for monthly internetservice for a cell phone.which function, c(x), represents the monthly cost in dollarsin terms of x, the number of gigabytes used in a month? cell phone internet service(15,5x + 10150,0sx522 < x < 664x115, osx< 25x + 20, 2< x< 650, 65815%,monthly cost (s)20x + 5| 50x,0 < x < 22 < x < 664x( 15x, osx< 2c(x) = 5x + 10, 2< x< 6150x, 65 x5+1234 5 6 7 8 9 10 11 12gigabytes used

Need 50 will mark brainliest answer. find the lengths of all the sides and the measures of the angles.

The value of x in this system of equations is 1. 3x + y = 9 y = –4x + 10 substitute the value of y in the first equation: combine like terms: apply the subtraction property of equality: apply the division property of equality: 3x + (–4x + 10) = 9 –x + 10 = 9 –x = –1 x = 1 what is the value of y?