Solar tides are (a) twice as high as lunar tides
(b) four times as large as lunar tides
(c) about the same size as lunar tides
(d) about ½ as high as lunar tides (
e) about ¼ the size of lunar tides

multiple

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west

the temperature in kelvin of 2.0 dm3 of an ideal gas is doubled and its pressure is increased by a factor of four. what is the final volume of the gas