Por favor ayudenme con simplificacion y multiplicacion de estos numeros 1 1/2×1 2/3 1 1/5×1 1/9×1 1/8×1 3/5

Aremote-controlled boat can travel at 4 feet per second in calm water. the boat traveled 48 feet with the current, and then it traveled 16 feet against the current in the same amount of time. how fast is the current?

Answer asap. you begin with 1/2 scoop of ice cream. since you're hungry, you ask the vendor for 2/7 more scoops of ice cream. then, you eat 5/8 scoops. how many scoops of ice cream are left on your cone? i will mark brainliest for first correct answer.

The curved part of the figure is the semicircle what is the best approximation for the area of this figure