The function f(t) = 4 cos(pi over 3t) + 15 represents the tide in bright sea. it has a maximum of 19 feet when time (t) is 0 and a minimum of 11 feet. the sea repeats this cycle every 6 hours. after five hours, how high is the tide? 13.5 feet 16 feet 18.5 feet 17 feet

1. the wheeling bridge in west virginia is about 307 meters long. if you walk with a stride of about meter, about how many steps would it take you to cross this suspension bridge?

Aplane is taking off from bangladesh headed to new york city. at the same time, a plane from new york city is headed to bangladesh is also taking off. the plane bound to new york city is traveling at 600 mph, while the plane traveling to bangladesh is traveling at 400 mph. how far from new york city will the two planes meet if the distance between new york city and bangladesh is 8,000 miles?

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11