The answer to which situation is best estimated by-7?
A The temperature falls 1.9°F from 4.3°F.
B A hot-air balloon rises 4.1 meters from the ground
and then rises 2.3 meters more.
C A submarine goes 3.8 feet below the surface of the
ocean and then goes 2.5 feet farther down.
D The amount of money Sarah has after she buys milk
for $3.85 and bread for $2.45.

The magnitude, m, of an earthquake is defined to be m=log l/s, where i is the intensity of the earthquake (measured by the amplitude of the seismograph wave) and s is the intensity of a “standard” earthquake, which is barely detectable. what is the magnitude of an earthquake that is 1,000 times more intense than a standard earthquake? use a calculator. round your answer to the nearest tenth.

Aconstruction worker has rope 9 m long he needs to cut it in pieces that are each 3 /5 m long how many such pieces can he cut without having any rope leftover?

The measures of the angles in △abc are given by the expressions in the table. angle measure angle a 65° angle b (3x−10)° angle c (2x)∘ find the value of x. then find the m∠b and m∠c.