Anthony had 60$ in his saving account. He earned 40$ a week mowing his neighbors lawns. He wants to buy a bike that cost $260. How many weeks does Anthony nerd to work in order to pay for his bike ​

Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?

The volume of the a sphere whoes diameter is 18 cm is cubic cm . if it's diameter were reduced by half, it's volume would be of its original volume

Can someone me with this? i’m not sure what to put for my equations.