The combined volume of all the tanks at an aquarium is 1.25*10^6 gallons. The aquarium ... At an aquarium is 1.25*10^6 gallons. The aquarium plans to install a new dolphin tank with a volume of 250000 gallons. What will be the total volume of all the tanks at the aquarium after the new dolphin tank is install.

1.50 × 10^6 gallons

Step-by-step explanation:

Given that ;

Combined volume of all tanks = 1.25×10^6 gallons

Volume of new tank to be installed = 250000 gallons

Total volume of all tanks after installing the new tank:

Initial volume of combined tanks + volume of new tank

1.25×10^6 + 250000

250000 in standard notation

250000 = 0.25×10^6

Hence,

1.25×10^6 + 0.25×10^6

= (1.25 + 0.25) × 10^6

= 1.50 × 10^6 gallons

9514 1404 393

  72.5° ≈ 73°

Step-by-step explanation:

The ladder length is the hypotenuse of the right triangle that has the distance from the building as its base and the height up the building as the height of the triangle. The given dimensions are those of the side adjacent to the angle and the hypotenuse.

The appropriate trig relation is ...

  Cos = Adjacent/Hypotenuse

  cos(angle) = 6/20

The inverse cosine function (arccos) is used to find the angle from its cosine.

  angle = arccos(6/20) ≈ 72.54°

The angle is 72.5° rounded to tenths, or 73° rounded to degrees.