4. If 0° < theta <90° and cos theta = 11/61 , find cos 2 theta

4. a spring scale is constructed so that each 0.10-n increment is separated by 0.50 cm. what spring constant is necessary for the scale to be accurate? -1.0n/cm -0.10n/cm -9.8 n/cm -0.20n/cm

The tile along the edge of a triangular community pool needs to be replaced? ?

Which strategy is used by public health to reduce the incidence of food poisoning?